Valve
Half-Life 2
PaidPick up the crowbar of research scientist Gordon Freeman and rescue the world from the wrong he unleashed back at Black Mesa.
WindowsTeam Fortress 2
FreeJoin the battle, defend your base, and engage in team based combat.
WindowsSteam
FreeJoin one of the largest video game distribution platforms with millions of users worldwide.
WindowsCounter Strike: Source
PaidPlay a classic game of Counter-Strike in a source engine.
WindowsSource Filmmaker
FreeMake movies inside the Source game engine.
WindowsCounter Strike: Global Offensive
PaidFight as a terrorist or counter-terrorist on various classic and modern maps.
WindowsValve Complete Pack
PaidEnjoy all of Valve's games in one bundle.
WindowsHalf-Life 2
PaidShoot your way through hordes of zombies and combines to reach your goal.
WindowsDota 2
FreeBattle to control a fantasy landscape, waging campaigns of cunning, stealth, and outright warfare.
WindowsPortal
PaidSolve physical puzzles and challenges by opening portals to maneuvering objects through space.
WindowsHalf-Life Complete
PaidRescue the world from the alien threat.
WindowsSteam Mobile
FreeParticipate in the Steam community wherever you go.
iOSHalf-Life 2: Episode One
PaidStep into the hazard suit of Dr. Gordon Freeman and fight against the totalitarian alien menace.
WindowsSteam Chat
FreeTake your Steam friends, groups, and conversations with you wherever you go.
AndroidCounter-Strike Condition Zero
PaidPlay the sequel to the original Counter-Strike with extensive campaign and numerous skirmish modes.
WindowsAlien Swarm
FreeTeam up with your friends and hunt down the bugs with squad-level tactics.
WindowsSteamOS Custom
FreeCombine the rock-solid architecture of Linux with a gaming experience built for the big screen.
LinuxDota Underlords
FreeStrategy Battler.
iOSHalf-Life 3
PaidHalf-Life 3 is the game fans are waiting for but it has not yet been announced or confirmed by the series creator, Valve.
WindowsRoboBlitz demo
FreeControl a robot and his aging cannon to save the world from space pirates.
WindowsLeft 4 Dead 2
PaidPlay co-operative action horror FPS.
WindowsGunman Chronicles Datacore map
FreeAdd the Datacore map to Gunman.
WindowsHalf-Life 2: Episode Two Research and Development Mod
FreePlay a puzzle-focused Half-life 2 Episode 2 mod.
WindowsSteam
FreePlay, connect, and create various content.
Mac