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Counter-Strike: Global Offensive
Aug 21, 2012
4m
83

Counter-Strike: Global Offensive

Counter-Strike: Global Offensive (CS: GO) expands upon the team-based action gameplay that it pioneered when it was launched 19 years ago. CS: GO features new maps, characters, weapons, and game modes, and delivers updated versions of the classic CS content (de_dust2, etc.).

Garry's Mod
Nov 29, 2006
802k

Garry's Mod

Garry's Mod is a physics sandbox. There aren't any predefined aims or goals. We give you the tools and leave you to play.

Left 4 Dead 2
Nov 16, 2009
528k
89

Left 4 Dead 2

Set in the zombie apocalypse, Left 4 Dead 2 (L4D2) is the highly anticipated sequel to the award-winning Left 4 Dead, the #1 co-op game of 2008. This co-operative action horror FPS takes you and your friends through the cities, swamps and cemeteries of the Deep South, from Savannah to New Orleans across five expansive campaigns.

Portal 2
Apr 18, 2011
272k
95

Portal 2

The "Perpetual Testing Initiative" has been expanded to allow you to design co-op puzzles for you and your friends!

Counter-Strike
Nov 1, 2000
133k
88

Counter-Strike

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 affects your team's success. Your team's success affects your role.

Half-Life 2
Nov 16, 2004
123k
96

Half-Life 2

1998. HALF-LIFE sends a shock through the game industry with its combination of pounding action and continuous, immersive storytelling. Valve's debut title wins more than 50 game-of-the-year awards on its way to being named "Best PC Game Ever" by PC Gamer, and launches a franchise with more than eight million retail units sold worldwide.

Portal
Oct 10, 2007
107k
90

Portal

Portal™ is a new single player game from Valve. Set in the mysterious Aperture Science Laboratories, Portal has been called one of the most innovative new games on the horizon and will offer gamers hours of unique gameplay.

Counter-Strike: Source
Nov 1, 2004
101k
88

Counter-Strike: Source

Counter-Strike: Source blends Counter-Strike's award-winning teamplay action with the advanced technology of Source™ technology.

Half-Life
Nov 8, 1998
69k
96

Half-Life

Named Game of the Year by over 50 publications, Valve's debut title blends action and adventure with award-winning technology to create a frighteningly realistic world where players must think to survive. Also includes an exciting multiplayer mode that allows you to play against friends and enemies around the world.

Half-Life: Alyx
Mar 23, 2020
68k
93

Half-Life: Alyx

Half-Life: Alyx is Valve’s VR return to the Half-Life series. It’s the story of an impossible fight against a vicious alien race known as the Combine, set between the events of Half-Life and Half-Life 2. Playing as Alyx Vance, you are humanity’s only chance for survival.

Left 4 Dead
Nov 17, 2008
38k
89

Left 4 Dead

From Valve (the creators of Counter-Strike, Half-Life and more) comes Left 4 Dead, a co-op action horror game for the PC and Xbox 360 that casts up to four players in an epic struggle for survival against swarming zombie hordes and terrifying mutant monsters.

Half-Life 2: Episode Two
Oct 10, 2007
26k
90

Half-Life 2: Episode Two

Half-Life® 2: Episode Two is the second in a trilogy of new games created by Valve that extends the award-winning and best-selling Half-Life® adventure. As Dr. Gordon Freeman, you were last seen exiting City 17 with Alyx Vance as the Citadel erupted amidst a storm of unknown proportions.

Half-Life 2: Episode One
Jun 1, 2006
19k
87

Half-Life 2: Episode One

Half-Life 2 has sold over 4 million copies worldwide, and earned over 35 Game of the Year Awards. Episode One is the first in a series of games that reveal the aftermath of Half-Life 2 and launch a journey beyond City 17. Also features two multiplayer games. Half-Life 2 not required.

Team Fortress 2
Oct 10, 2007
18k
92

Team Fortress 2

Nine distinct classes provide a broad range of tactical abilities and personalities. Constantly updated with new game modes, maps, equipment and, most importantly, hats!

Counter-Strike: Condition Zero
Mar 1, 2004
16k
65

Counter-Strike: Condition Zero

With its extensive Tour of Duty campaign, a near-limitless number of skirmish modes, updates and new content for Counter-Strike's award-winning multiplayer game play, plus over 12 bonus single player missions, Counter-Strike: Condition Zero is a tremendous offering of single and multiplayer content.

Half-Life: Opposing Force
Nov 1, 1999
14k

Half-Life: Opposing Force

Return to the Black Mesa Research Facility as one of the military specialists assigned to eliminate Gordon Freeman. Experience an entirely new episode of single player action. Meet fierce alien opponents, and experiment with new weaponry. Named 'Game of the Year' by the Academy of Interactive Arts and Sciences.

Dota 2
Jul 9, 2013
14k
90

Dota 2

Every day, millions of players worldwide enter battle as one of over a hundred Dota heroes. And no matter if it's their 10th hour of play or 1,000th, there's always something new to discover. With regular updates that ensure a constant evolution of gameplay, features, and heroes, Dota 2 has taken on a life of its own.

Day of Defeat: Source
Jul 12, 2010
13k
80

Day of Defeat: Source

Valve's WWII Multiplayer Classic - Now available for Mac.

Half-Life: Source
Jun 1, 2004
11k

Half-Life: Source

Winner of over 50 Game of the Year awards, Half-Life set new standards for action games when it was released in 1998. Half-Life: Source is a digitally remastered version of the critically acclaimed and best selling PC game, enhanced via Source technology to include physics simulation, enhanced effects, and more.

Half-Life: Blue Shift
Jun 1, 2001
11k
71

Half-Life: Blue Shift

Made by Gearbox Software and originally released in 2001 as an add-on to Half-Life, Blue Shift is a return to the Black Mesa Research Facility in which you play as Barney Calhoun, the security guard sidekick who helped Gordon out of so many sticky situations.

Half-Life 2: Lost Coast
Oct 27, 2005
9k

Half-Life 2: Lost Coast

Originally planned as a section of the Highway 17 chapter of Half-Life 2, Lost Coast is a playable technology showcase that introduces High Dynamic Range lighting to the Source engine.

Half-Life 2: Deathmatch
Nov 1, 2004
8k

Half-Life 2: Deathmatch

Fast multiplayer action set in the Half-Life 2 universe! HL2's physics adds a new dimension to deathmatch play. Play straight deathmatch or try Combine vs. Resistance teamplay. Toss a toilet at your friend today!

Team Fortress Classic
Apr 1, 1999
5k

Team Fortress Classic

One of the most popular online action games of all time, Team Fortress Classic features over nine character classes -- from Medic to Spy to Demolition Man -- enlisted in a unique style of online team warfare. Each character class possesses unique weapons, items, and abilities, as teams compete online in a variety of game play modes.

Day of Defeat
May 1, 2003
4k
79

Day of Defeat

Enlist in an intense brand of Axis vs. Allied teamplay set in the WWII European Theatre of Operations. Players assume the role of light/assault/heavy infantry, sniper or machine-gunner class, each with a unique arsenal of historical weaponry at their disposal. Missions are based on key historical operations.

Ricochet
Nov 1, 2000
3k

Ricochet

A futuristic action game that challenges your agility as well as your aim, Ricochet features one-on-one and team matches played in a variety of futuristic battle arenas.

Half-Life Deathmatch: Source
May 1, 2006
3k

Half-Life Deathmatch: Source

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.

Deathmatch Classic
Jun 1, 2001
2k

Deathmatch Classic

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.

Alien Swarm
Jul 19, 2010
312
77

Alien Swarm

Co-operative multiplayer game and complete code base available for free.

The Lab
Apr 5, 2016
261

The Lab

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!

Source Filmmaker
Jul 10, 2012
245

Source Filmmaker

The Source Filmmaker (SFM) is the movie-making tool built and used by us here at Valve to make movies inside the Source game engine. Because the SFM uses the same assets as the game, anything that exists in the game can be used in the movie, and vice versa.