512:
Green are assigned to assist setting up the experiment for Gordon
Freeman. When Freeman inserts the specimen into the scanning beam, however, it triggers a "resonance cascade", causing massive damage to the facility and teleporting alien creatures into the base. Keller and Rosenberg agree that Black Mesa cannot deal with the situation on its own, and so decide to call for military assistance. Cross and Green escort Rosenberg to the surface, where he sends a distress signal to the military. However, the military are ordered not only to contain the situation, but to silence the base by killing its employees. Rosenberg elects to stay behind to meet with the military on arrival and Cross and Green return to Keller.
520:, is used in tandem with ground-based equipment to significantly weaken the effects of the resonance cascade. Keller tasks Cross and Green with activating this set of prototype equipment, a displacement beacon, which through the satellite may be able to seal the dimensional rift. However, after activating the beacon, both characters are caught up in a "harmonic reflux", a distortion caused by the rift. Despite this, Cross and Green are able to return safely and Keller congratulates them on their success.
1070:: The dimensional rift between here and the alien world must be sealed! We'll need to have a satellite in orbit in order to orchestrate a resonance reversal. The signal room for the satellite is nearby. Unfortunately the delivery rocket cannot launch without the all-clear codes. Now, any security guard in this dorm complex should have the codes we need. Go through the dorms and find a security guard, I'll take the tram around to the north side where we can pick you up.
287:
403:
player's accuracy with weapons, the number of kills they acquired and the amount of damage they sustained during the course of the mission. Should players successfully complete the game's nine missions with "A" grades on every level, they are given access to a bonus cooperative mission, in which they can play as a pair of
Vortigaunts, as well as the ability to play through the PlayStation 2 version of the original
2844:
2093:
535:. In the level, two player-controlled vortigaunts battle through Marines and Black Ops in the underground Black Mesa complex to find the orange crystals in the back of a military van. After the crystals are recovered, the screen fades to black and the mission is declared a success; it is presumed that the Nihilanth warps the vortigaunts back to Xen and installs the crystals in his cave.
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416:
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was "impressive", praising the design of puzzles required players to work together, as well as the way in which the ranking system discouraged players from competing against each other. GameSpy's David
Hodgson was more reserved in his views of the game; although describing it as "great fun", he noted
267:
was not a critical success, but was received with some positivity by video game journalists. Many reviewers felt the game was best when played with other players, but that its more puzzle-oriented gameplay somewhat detracted from the overall experience. A number of reviews stated that the game simply
511:
begins with Gina Cross and
Colette Green arriving at the Anomalous Materials Labs at Black Mesa and reporting to Dr. Keller, who is readying the day's analysis of an unknown specimen. Despite the objections of Dr. Rosenberg to pushing the analysis equipment beyond its design capacities, Cross and
515:
Once reunited with Keller, Cross and Green work to seal the dimensional tear to stop the invasion. The military arrive and try to remove all personnel as well as the alien force. After resetting key equipment to prevent a second dimensional rift, the two are tasked with preparing a satellite for
402:
series in that it is the only game divided into separate missions, each with a specific objective to pursue, instead of consisting of a single unbroken narrative. How players perform in each mission is ranked at the conclusion of the level as a grade from "A" to "F". This score is based on each
1098:: Gina? Colette? You'll be alright. You were caught for a moment in a harmonic reflux. Its one the swirling eddies in the space between two displacement event currents, although I can't imagine who was creating the other current. But it doesn't matter now! Rest my friends, we did it!
34:
594:
s premise and story, as well as confirming that the cooperative mode was to be designed for two players. The game's use of new model sets were also showcased. These new models were updated versions of
Gearbox's High Definition pack for
722:, but noted that as the game was designed for two players, it significantly suffered when a single player attempts to play it by switching between two characters, a point that both GameSpy and GameSpot agreed on. In his review for
1034:: No! We've got the deal with the problem! We can't expect anyone else to understand the importance of resetting those dampening fields. Without those in place the dimensional gash could tear so wide it may never be repaired. /
706:
that it could become "tedious, with one member waiting for minutes at a time, while the other scratches their head, then completes an objective". In addition, Hodgson felt that the more puzzle-orientated nature of
1038:: Its too dangerous! If we fail, who will warn everyone else? We can have soldiers here in two hours to secure the facility and bring everyone to safety. Our concern must be for the people of Black Mesa. /
990:: I've been talking with Harold, he seems to be under the impression you're planning on running the anti-mass spectrometer at greater than 90 percent. You realise there is a reason for the safety buffer. /
356:
can still be played by a single player. In this case, the player can only control one character at a time, and can switch between the two characters quickly. When not in use, a character has sufficient
799:
609:
features such as facial expressions. The enhanced models were around twice as detailed as those in the High
Definition pack, which itself was of a much higher quality than the original models in
730:
was "neat in its own limited way", but that it was more of a distraction from the main game, more "a complementary cup of vegetable soup than a piping hot main dish of New York steak". While
473:, allowing the alien creatures of Xen to attack the facility. The player guides Freeman in an attempt to escape the facility and close the portal, ultimately traveling to Xen to do so.
492:, players assume the roles of Colette Green and Gina Cross, two doctors who work in the same labs as Freeman, analyzing anomalous materials and specimens retrieved from Xen in prior
376:
are dedicated to working with friendly non-player characters, usually escorting them to various objectives and protecting them in firefights. An array of enemy characters from
3408:
496:
experiments. After the experiment that causes the alien invasion takes place, Green and Cross must work with two ranking members of the science team, Dr. Richard Keller and
3418:
348:. This requires players to work together to progress through the game's levels and complete puzzles as they arise in-game. Although intended to be played by two people in
3428:
1215:
368:, players usually fight alone and only occasionally encounter friendly non-player characters who assist them, such as security guards and scientists. While
1139:
1002:: This is not your decision! Now if you want to stay and monitor the experiment, so be it, otherwise you can go back to your little labs by the trainyard.
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2881:
1681:
813:
1364:
1290:
875:
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841:
613:. Media updates through the months following E3 showed various screenshots and the trailer to the game. On August 18, 2001, Sierra announced that
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in
December 2007 and was released publicly on September 23, 2008. The port was received well by the journalists in the industry;
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returns to the setting and timeline of the original story, albeit portraying the story from the viewpoint of a different set of
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998:: The administrator is a bureaucrat, not a scientist! I did not design this equipment to be run at such high intensity! /
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on
October 30, 2001, and the game was released on November 14, 2001 in North America, and in Europe on November 30.
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3017:
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1871:
567:, were still experimenting with finding the most balanced number of players to build a cooperative game around. By
388:, as well as human soldiers sent in to contain the alien threat. The players have access to a limited selection of
682:
never emerged, while
British journalist Alec Meer stated that it was "fantastic to have this short but sweet lost
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3206:
3047:
2867:
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2173:
1714:
1667:
911:
334:
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889:
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3121:
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415:
3160:
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2733:
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1954:
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1637:
732:
527:, provides background information that explains how the orange crystals used by the rift-sealing machine in
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received a weak but overall positive reception from the video games industry's critics. Writing for
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to defend themselves, but otherwise does not move from where they have been left by the player.
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1030:: Well, we've got to get everyone out of here! Reach the surface, call for help, something! /
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1042:: Perhaps you're right. Dr. Cross and Dr. Green may have survived, if so they can help us.
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70:
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s PS2 game files to be converted to
Windows version of the game. The port went into the
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740:"is about the best we have seen on the PS2 or any console", he concluded that although
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58:
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episode on PC at last, and it even has something the PS2 version didn't—online play".
423:; the models used in the game were of a significantly higher quality than in previous
33:
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reviewer Steve Smith stated that the control scheme for the PlayStation 2 version of
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left the action elements "a little muted compared to Gordon's single player quest".
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3192:
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2662:
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1192:
1124:
1400:
257:, designed to be played by two people working together to pass through the game's
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and complete various puzzle solving tasks to advance through the game. However,
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994:: I understand your concern doctor, but the administrator was quite clear. /
2788:
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2677:
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2011:
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felt like little more than an extra add-on for the PlayStation 2 version of
617:
was nearly complete, and would be submitted to PlayStation 2 manufacturer
583:
titles. While the E3 convention only provided a demonstration of the main
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1299:
1224:
1148:
884:
808:
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are acquired and used by the Nihilanth during the final boss battle in
116:
923:
632:
In October 2005, work was begun by a group of Ukrainian developers to
500:, to contain and stabilize the deteriorating situation in Black Mesa.
372:
still features levels where this is the case, significant sections in
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2450:
151:
559:. At the time, however, it was unclear how a cooperative version of
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2397:
414:
285:
2440:
618:
2863:
2111:
1663:
1600:
1263:
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1119:
723:
587:
PlayStation 2 game, further details were released relating to
1659:
659:. The port relied on the discovery of a method that allowed
579:
for consistency with the scientific names used by previous
744:
was a "nice add-on", it was "no reason to buy this port".
678:
noted that it was a shame that an official PC version of
2107:
516:
launch. The satellite, which is launched by Freeman in
3324:
718:
as an "added bonus" for the PlayStation 2 version of
380:
populate the game, including alien lifeforms such as
465:, a scientist involved in an accident that opens an
3265:
3170:
3131:
3101:
3071:
3034:
2962:
2911:
2806:
2716:
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2583:
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2540:
2474:
2438:
2409:
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2003:
1944:
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1849:
1814:
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1784:
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175:
163:
134:
122:
110:
98:
76:
64:
52:
40:
26:
320:requires players to engage in combat with hostile
943:
941:
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2123:
1675:
441:is set in the same location and timeframe as
8:
551:in November 2000 with the announcement of a
233:in 2001. It is the third expansion pack for
1173:
1171:
484:from the perspective of a different set of
301:As is the case with the other games in the
3409:Video games developed in the United States
3092:Duke Nukem 3D: 20th Anniversary World Tour
2882:
2868:
2860:
2652:
2544:
2151:
2130:
2116:
2108:
1893:
1788:
1682:
1668:
1660:
793:
791:
789:
787:
785:
316:. Like the original title it is based on,
32:
23:
3419:Video games featuring female protagonists
1469:. Half-Life Creations. September 23, 2008
835:
833:
831:
621:for verification within days. The entire
398:The game is unique in the context of the
575:, named after the scientific concept of
3331:
752:
547:game was first alluded to by publisher
449:takes place at a laboratory called the
395:s weaponry to assist them in the game.
563:would be implemented; the developers,
2040:Half-Life VR but the AI Is Self-Aware
1488:Phillips, John (September 24, 2008).
7:
3429:Video games set in the United States
1191:. September 19, 2001. Archived from
888:. September 13, 2001. Archived from
798:Radcliffe, Doug (October 15, 2001).
1123:. November 17, 2000. Archived from
625:for PlayStation 2 package achieved
332:and its first two expansion packs,
1363:Ahmed, Shahed (November 7, 2001).
1326:Ahmed, Shahed (October 30, 2001).
1214:Ajami, Amer (September 11, 2001).
1065:). Level/area: Domestic Violence.
571:, the game had acquired the title
461:, the player takes on the role of
14:
3364:Video games about alien invasions
2026:Half-Life: Full Life Consequences
1590:Perry, Doug (November 16, 2001).
1529:Meer, Alec (September 28, 2008).
1289:Ahmed, Shahed (August 18, 2001).
1266:. August 11, 2001. Archived from
453:, situated in a remote desert in
3334:
2843:
2842:
2092:
2091:
419:Colette Green and Gina Cross in
346:cooperative multiplayer gameplay
245:: two scientists working in the
3384:Video games set in laboratories
3274:Counter-Strike: Condition Zero
3186:Bulletstorm: Full Clip Edition
3025:New Tales from the Borderlands
2033:Half-Life: Escape from City 17
726:, critic Doug Perry felt that
601:, featuring higher numbers of
476:Like the previous expansions,
1:
3434:Video games set in New Mexico
1138:Fielder, Joe (May 18, 2001).
701:, Doug Radcliffe argued that
344:, in that it is designed for
237:, and like its predecessors,
3424:Video games set in the 2000s
3179:Homeworld: Deserts of Kharak
1822:Black Mesa Research Facility
1025:). Level/area: Dual Access.
985:). Level/area: Dual Access.
451:Black Mesa Research Facility
255:cooperative multiplayer game
247:Black Mesa Research Facility
225:was released as part of the
3399:Science fiction video games
3288:Brothers in Arms: Furious 4
523:An unlockable bonus level,
3460:
3414:Video game expansion packs
3281:Tales from the Borderlands
1878:Half-Life 2: Episode Three
279:
3439:Video games about zombies
3207:Trover Saves the Universe
2897:
2837:
2087:
804:for PlayStation 2 Review"
31:
3394:PlayStation 2-only games
3379:Half-Life (series) games
3140:Tony Hawk's Pro Skater 3
1990:Research and Development
953:Half-Life: Decay PC Port
467:inter-dimensional portal
3404:Valve Corporation games
3369:Cooperative video games
3018:Tiny Tina's Wonderlands
3004:The Handsome Collection
1638:The Electric Playground
733:The Electric Playground
359:artificial intelligence
3444:Gearbox Software games
2636:World Opponent Network
668:beta development stage
649:World Opponent Network
469:to the borderworld of
434:Characters and setting
430:
298:
3374:First-person shooters
2384:Team Fortress Classic
1976:Hunt Down the Freeman
1969:Entropy : Zero 2
1510:on September 26, 2008
1344:on September 28, 2006
1256:Hi-Res Trailer (PS2)"
1093:). Level/area: Rift.
955:. Half-Life Creations
418:
322:non-player characters
289:
282:Gameplay of Half-Life
3147:Halo: Combat Evolved
2905:Take-Two Interactive
1369:PS2 ships next week"
314:first-person shooter
206:first-person shooter
170:First-person shooter
3389:PlayStation 2 games
2819:Steam Trading Cards
1535:: The Lost Chapter"
1127:on August 31, 2011.
916:: The Story so Far"
480:shows the story of
297:mode, as seen here.
3085:Duke Nukem Forever
1645:on October 3, 2008
1540:Rock Paper Shotgun
1232:on January 3, 2013
1195:on August 31, 2011
1140:"E3 2001 Hands-on
431:
299:
3322:
3321:
3235:Tribes of Midgard
2857:
2856:
2802:
2801:
2644:
2643:
2536:
2535:
2284:Aperture Desk Job
2277:Aperture Hand Lab
2105:
2104:
2057:Valve Corporation
1999:
1998:
1845:
1844:
1608:on March 11, 2010
1467:- It's released!"
1295:nears completion"
1115:to PlayStation 2"
1111:"Sierra Delivers
647:for both the old
577:exponential decay
407:as a Vortigaunt.
217:and published by
185:
184:
156:November 30, 2001
147:November 14, 2001
85:Matthew Armstrong
3451:
3359:2001 video games
3339:
3338:
3337:
3330:
3249:Star Trek Online
3122:Colonial Marines
2914:Brothers in Arms
2903:; a division of
2891:Gearbox Software
2884:
2877:
2870:
2861:
2846:
2845:
2824:The Steam Awards
2794:Yanis Varoufakis
2653:
2631:Valve Anti-Cheat
2616:Source Filmmaker
2555:Steam Controller
2545:
2364:Counter-Strike 2
2357:Global Offensive
2152:
2132:
2125:
2118:
2109:
2095:
2094:
1962:Capture the Flag
1907:Action Half-Life
1894:
1872:Unreleased games
1789:
1684:
1677:
1670:
1661:
1655:
1654:
1652:
1650:
1641:. Archived from
1624:
1618:
1617:
1615:
1613:
1604:. Archived from
1587:
1581:
1580:
1578:
1576:
1558:
1552:
1551:
1549:
1547:
1526:
1520:
1519:
1517:
1515:
1506:. Archived from
1499:Planet Half-Life
1492:Half-Life: Decay
1485:
1479:
1478:
1476:
1474:
1465:Half-Life: Decay
1459:
1453:
1452:
1450:
1448:
1428:
1422:
1421:
1419:
1417:
1397:
1391:
1390:
1388:
1386:
1381:on July 17, 2012
1377:. Archived from
1360:
1354:
1353:
1351:
1349:
1340:. Archived from
1323:
1317:
1316:
1314:
1312:
1307:on July 17, 2012
1303:. Archived from
1293:Half-Life: Decay
1286:
1280:
1279:
1277:
1275:
1270:on July 13, 2011
1248:
1242:
1241:
1239:
1237:
1228:. Archived from
1220:Updated preview"
1211:
1205:
1204:
1202:
1200:
1175:
1166:
1165:
1163:
1161:
1156:on June 19, 2009
1152:. Archived from
1135:
1129:
1128:
1107:
1101:
1100:
1087:Half-Life: Decay
1083:Gearbox Software
1079:
1073:
1072:
1059:Half-Life: Decay
1055:Gearbox Software
1051:
1045:
1044:
1019:Half-Life: Decay
1015:Gearbox Software
1011:
1005:
1004:
979:Half-Life: Decay
975:Gearbox Software
971:
965:
964:
962:
960:
945:
936:
935:
933:
931:
926:on July 25, 2008
922:. Archived from
908:
902:
901:
899:
897:
892:on July 21, 2012
872:
866:
865:
863:
861:
852:. Archived from
840:Hodgson, David.
837:
826:
825:
823:
821:
816:on June 20, 2009
812:. Archived from
795:
780:
779:
777:
775:
757:
676:Planet Half-Life
665:
593:
565:Gearbox Software
529:Half-Life: Decay
394:
215:Gearbox Software
189:Half-Life: Decay
155:
146:
47:Gearbox Software
36:
27:Half-Life: Decay
24:
3459:
3458:
3454:
3453:
3452:
3450:
3449:
3448:
3349:
3348:
3345:
3335:
3333:
3325:
3323:
3318:
3314:Cryptic Studios
3309:Randy Pitchford
3261:
3171:Published games
3166:
3127:
3107:franchise games
3097:
3067:
3040:expansion packs
3030:
2958:
2932:Earned in Blood
2925:Road to Hill 30
2907:
2893:
2888:
2858:
2853:
2833:
2798:
2759:Mike Harrington
2712:
2640:
2579:
2532:
2470:
2465:Dota Underlords
2434:
2405:
2391:Team Fortress 2
2369:
2289:
2239:
2234:Half-Life: Alyx
2141:
2136:
2106:
2101:
2083:
2045:
1995:
1940:
1885:
1841:
1810:
1780:
1775:Half-Life: Alyx
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856:on July 9, 2008
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293:is played in a
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213:. Developed by
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91:Randy Pitchford
71:Randy Pitchford
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21:2001 video game
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3221:Risk of Rain 2
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3048:Opposing Force
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2997:The Pre-Sequel
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1627:Smith, Steve.
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1332:PS2 goes gold"
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543:A cooperative
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2483:Day of Defeat
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1473:September 26,
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959:September 26,
954:
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949:"About Decay"
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54:Publisher(s)
42:Developer(s)
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3341:Video games
3295:Borderlands
3256:Homeworld 3
3242:Neverwinter
3132:Other games
3115:Infestation
2976:Borderlands
2965:Borderlands
2953:Double Time
2814:Campo Santo
2744:Jess Cliffe
2739:Doug Church
2708:Erik Wolpaw
2693:Jake Rodkin
2683:Gabe Newell
2575:Valve Index
2513:Alien Swarm
2499:Garry's Mod
2422:Left 4 Dead
2412:Left 4 Dead
2225:Episode Two
2218:Episode One
2197:Half-Life 2
1850:Development
1832:Gravity gun
1766:Episode Two
1759:Episode One
1738:Half-Life 2
1649:October 24,
1612:October 24,
1575:October 24,
1546:October 24,
1514:October 24,
1385:October 23,
1348:October 23,
1311:October 23,
1274:October 23,
1236:October 23,
1199:October 23,
1160:October 23,
896:October 23,
860:October 23,
820:October 23,
774:October 23,
627:gold status
555:version of
539:Development
525:Xen Attacks
386:Vortigaunts
229:version of
194:multiplayer
180:Multiplayer
124:Platform(s)
66:Designer(s)
3353:Categories
3161:Battleborn
3074:Duke Nukem
3055:Blue Shift
2784:Chris Remo
2565:Steam Link
2560:Steam Deck
2541:Technology
2211:Lost Coast
2204:Deathmatch
2181:Blue Shift
2004:Web series
1955:Black Mesa
1935:Sven Co-op
1914:C.A.G.E.D.
1806:Alyx Vance
1793:Characters
1752:Lost Coast
1745:Deathmatch
1722:Blue Shift
842:"Reviews:
748:References
714:described
598:Blue Shift
455:New Mexico
341:Blue Shift
280:See also:
88:Brian Hess
3303:Homeworld
3200:Earthfall
3037:Half-Life
2789:Kim Swift
2779:Bay Raitt
2678:Brad Muir
2673:Olly Moss
2167:Half-Life
2157:Half-Life
2012:Concerned
1837:Ravenholm
1708:Half-Life
1692:Half-Life
1631:Half-Life
1629:"Review:
1594:Half-Life
1564:Half-Life
1533:Half-Life
1494:Released"
1447:March 30,
1434:Half-Life
1416:March 30,
1403:Half-Life
1367:Half-Life
1330:Half-Life
1254:Half-Life
1218:Half-Life
1181:Half-Life
1142:Half-Life
1113:Half-Life
1036:Rosenberg
1028:Rosenberg
996:Rosenberg
988:Rosenberg
930:March 24,
914:Half-Life
878:Half-Life
844:Half-Life
802:Half-Life
763:Half-Life
738:Half-Life
720:Half-Life
690:Reception
684:Half-Life
657:Half-Life
623:Half-Life
611:Half-Life
607:animation
585:Half-Life
581:Half-Life
561:Half-Life
557:Half-Life
545:Half-Life
533:Half-Life
518:Half-Life
482:Half-Life
459:Half-Life
447:Half-Life
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400:Half-Life
390:Half-Life
382:headcrabs
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366:Half-Life
330:Half-Life
304:Half-Life
270:Half-Life
235:Half-Life
231:Half-Life
210:Half-Life
104:Half-Life
78:Writer(s)
2899:Part of
2848:Category
2611:Source 2
2584:Software
2548:Hardware
2527:Deadlock
2458:Artifact
2263:Portal 2
2097:Category
1867:Source 2
1785:Universe
1374:GameSpot
1337:GameSpot
1300:GameSpot
1225:GameSpot
1183:Preview"
1149:GameSpot
1085:(2001).
1057:(2001).
1017:(2001).
977:(2001).
885:GameSpot
880:Q&A"
809:GameSpot
765:Credits"
699:GameSpot
639:over to
603:polygons
411:Synopsis
276:Gameplay
165:Genre(s)
3266:Related
3228:Godfall
2990:Legends
2807:Related
2774:Jane Ng
2769:Minh Le
2656:Current
2626:SteamOS
2591:GoldSrc
2320:Inferno
2313:Dust II
2270:The Lab
2078:Vlogger
2050:Related
1983:Minerva
1898:GoldSrc
1857:GoldSrc
1827:Combine
1596:Review"
1570:Allgame
1566:Review"
1504:GameSpy
1410:GameSpy
1260:Insider
850:GameSpy
769:Allgame
712:Allgame
672:GameSpy
643:, as a
641:Windows
569:E3 2001
429:titles.
176:Mode(s)
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3297:(film)
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2606:Source
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2596:OpenVR
2490:Source
2451:Dota 2
2341:Source
2327:Mirage
2256:Portal
2246:Portal
2065:series
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1946:Source
1928:Echoes
1862:Source
846:(PS2)"
352:mode,
306:series
259:levels
196:-only
112:Engine
99:Series
3104:Alien
3077:games
3062:Decay
2939:D-Day
2621:Steam
2475:Other
2398:2Fort
2188:Decay
2147:Games
2139:Valve
1921:Delta
1815:Other
1729:Decay
1700:Games
920:Valve
742:Decay
728:Decay
716:Decay
708:Decay
703:Decay
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680:Decay
674:site
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661:Decay
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490:Decay
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634:port
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