You can escort around 45 guards and scientists throughout the game.

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 ...

Half-Life Lemmings, out now, is a mod that makes some changes to Valve's classic FPS to let you save every scientist and guard We may earn a commission when you buy ...