All the Latest Game Footage and Images from Portal done Half-Life Source Portal done Half-Life Source is a mod in which you are required to play through Portal 1's maps with the weaponry, movement and ...
New Half-Life 3 leaks point to major upgrades in NPC behaviour and physics, suggesting Valve's most ambitious and technically complex game yet.
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Best games that started as Half-Life mods
These games had humble beginnings, first as mere Half-Life mods, but have since grown into massive phenomena.
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