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| Half-Life series | Half-Life: Uplink · Half-Life [Blue Shift · Counter-Strike · Deathmatch: Source · Decay · Opposing Force · Source] · Half-Life 2 [Deathmatch · Episode One · Episode Two · Lost Coast · Survivor] · Half-Life: Alyx |  |
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| Portal series | ||
| Other games & releases | ||
| Information and fiction | Characters (Gordon Freeman · Alyx Vance · G-Man · GLaDOS) · Creatures (Combine · Headcrab · Vortigaunt) · Gravity gun · Locations | |
| Related articles | Concerned · Half-Life: Escape from City 17 · Half-Life 2: Raising the Bar · "Still Alive" · Narbacular Drop · Tag: The Power of Paint | |
| Mods | ||