Valve

Valve is an entertainment software and technology company founded in 1996. In addition to creating several of the world's most award-winning games, Valve is also a developer of leading-edge technologies including the Source game engine and Steam, the premier online gaming platform.

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Half-Life 2
Paid
Pick up the crowbar of research scientist Gordon Freeman and rescue the world from the wrong he unleashed back at Black Mesa.
Windows
Team Fortress 2
Free
Join the battle, defend your base, and engage in team based combat.
Windows
Counter Strike: Source
Paid
Play a classic game of Counter-Strike in a source engine.
Windows
Counter Strike: Global Offensive
Paid
Fight as a terrorist or counter-terrorist on various classic and modern maps.
Windows
Half-Life 2: Episode One
Paid
Step into the hazard suit of Dr. Gordon Freeman and fight against the totalitarian alien menace.
Windows
Steam
Free
Join one of the largest video game distribution platforms with millions of users worldwide.
Windows
Steam Chat
Free
Take your Steam friends, groups, and conversations with you wherever you go.
Android
Portal
Paid
Solve physical puzzles and challenges by opening portals to maneuvering objects through space.
Windows
Dota 2
Free
Battle to control a fantasy landscape, waging campaigns of cunning, stealth, and outright warfare.
Windows
Half-Life 2: Episode Two Research and Development Mod
Free
Play a puzzle-focused Half-life 2 Episode 2 mod.
Windows
Half-Life Complete
Paid
Rescue the world from the alien threat.
Windows
Source Filmmaker
Free
Make movies inside the Source game engine.
Windows
Steam Mobile
Free
Participate in the Steam community wherever you go.
iOS
Valve Complete Pack
Paid
Enjoy all of Valve's games in one bundle.
Windows
Steam
Free
Play, connect, and create various content.
Mac
SteamOS Default
Free
Combine the rock-solid architecture of Linux with a gaming experience built for the big screen.
Linux
Half-Life 2
Paid
Shoot your way through hordes of zombies and combines to reach your goal.
Windows
Alien Swarm
Free
Team up with your friends and hunt down the bugs with squad-level tactics.
Windows
Counter-Strike Condition Zero
Paid
Play the sequel to the original Counter-Strike with extensive campaign and numerous skirmish modes.
Windows
Left 4 Dead 2
Paid
Play co-operative action horror FPS.
Windows
Gunman Chronicles Datacore map
Free
Add the Datacore map to Gunman.
Windows
SteamOS Custom
Free
Combine the rock-solid architecture of Linux with a gaming experience built for the big screen.
Linux
RoboBlitz demo
Free
Control a robot and his aging cannon to save the world from space pirates.
Windows