Welcome to The Lab, a compilation of Valve’s room-scale VR experiments set in a pocket universe within Aperture Science. Fix a robot, defend a castle, adopt a mechanical dog, and more. Still not sold? It’s free!

Counter-Strike: Source blends Counter-Strike’s award-winning teamplay action with the advanced technology of Source™ technology. Featuring state of the art graphics, all new sounds, and introducing physics, Counter-Strike: Source is a [...]

Enjoy fast-paced multiplayer gaming with Deathmatch Classic (a.k.a. DMC). Valve’s tribute to the work of id software, DMC invites players to grab their rocket launchers and put their reflexes to the test in a collection of futuristic settings.

Opposing Force opens with Shephard riding on a V-22 Osprey with his squad. His squad discuss their deployment, somewhat irritated that they have not been told what they are being deployed for. However, as they are nearing their Landing Zone at Black Mesa, [...]

Dr. Gordon Freeman arrives late for work at 8:47 am in the Black Mesa Research Facility, using the advanced Black Mesa tram system that leads through the facility. He arrives at the Anomalous Materials Lab, his work place, and he is informed by the [...]

Half-Life Deathmatch: Source is a recreation of the first multiplayer game set in the Half-Life universe. Features all the classic weapons and most-played maps, now running on the Source engine.

Play the world’s number 1 online action game. Engage in an incredibly realistic brand of terrorist warfare in this wildly popular team-based game. Ally with teammates to complete strategic missions. Take out enemy sites. Rescue hostages. Your role [...]

Counter-Strike: Global Offensive (CS:GO) expands upon the team-based action gameplay that the franchise pioneered when it was launched 12 years ago. CS:GO features new maps, characters, and weapons and delivers updated versions of the classic CS content [...]