Programs developed by Valve

	Steam
	(73 votes)  13 521

Steam is a gaming platform with everything a gamer would want. Steam's interface is somewhat similar to Windows Explorer. It allows users to browse through all the game available and download demos, trailers, or the complete game. Once a game is downloaded through Valve's Steam, users can use Steam's multi-player service.

	Counter-Strike: Source
	(16 votes)  2 782

Counterstrike: Source is the evolution of the original Counterstrike and Condition Zero. It has included new graphix and physics delivering a new experience for the long time Counterstrike fans. Began as an experiment, now is an experimented success. People from all around the world play it online via STEAM.

	Left 4 Dead
	796

Left 4 Dead is, first-person shooter videogame developed by Valve and distributed by Steam and Electronic Arts. This horror masterpiece game can be also classified as a co-operative, survival horror action game, it is based on the same Source graphics engine of Counter-Strike and it is to be run on Windows operative system based PCs.

	Day of Defeat: Source
	(1 votes)  661

Day of Defeat: Source is a multiplayer first-person shooter game developed by Valve and published by Activision. This new version of Day of Defeat, is set on the fight in the European Theater during World War II, it uses the acclaimed Source engine, and it is very much realist game, it features better graphics and sounds, and above all great physics.

	Counter Strike
	(5 votes)  947

Counter-Strike or CS is a first person action videogame played by teams, the terrorists and the counter-terrorists. The gameplay in Counter-Strike develops in turns or rounds, of a maximum duration of 9 minutes, in which a team of terrorists is confronted with a team of antiterrorist guys.

	Day of Defeat
	(1 votes)  524

Day of Defeat is a team-based, first-person action multiplayer game developed and published by Valve. Its scenarios are set in the Europe's western front during World War II. Day of Defeat simulates infantry battles between the two main adversaries of World War II: the Axis and the Allies, and on some maps also the British.

	Portal: The First Slice
	163

Portal is one of the most innovative video games released in the past few years. The game is a first person "shooter." However, you don't actually shoot anything other than a special gun you are given. The gun is called Aperture Science Handheld Portal Device or "portal gun." With it, you can "bend" the physics' rules.

	Half-Life 2: Lost Coast
	171

Half-Life 2: Lost Coast is sort of an add-on for Half Life 2. This is actually an additional level that didn't make the cut when Half Life 2 was released. After a year, the developers came up with new technologies that they wanted to try before releasing Episode 2 of HL2. Thus, they released this game as a download for owners of the Windows game.

	Half-Life 2: Episode One
	149

Half-Life 2: Episode 1 is the sequel to the first Half-Life 2 game. Valve decided to make the newest games into a trilogy of Episodes. This is the first one. All the episodes use the Source engine, which is one of the best for first person shooters. Since the release of the game, the engine has been updated several times, and those changes reflect on the games that use the engine.

	Half-Life 2: Episode Two
	157

Half-Life 2: Episode Two is the sequel to the Episode 1. Both games are part of a trilogy that is supposed to end this year. This second episode takes a different approach. Both are first person shooters. Both were developed by different teams, which considered different aspects important. Both follow a common plot.

	Counter Strike - Condition Zero (Ultimate Edition)
	(1 votes)  37

Counter Strike: Condition Zero (shortened: CS: CZ or CZ) is a new version of Counter Strike with improved graphics , retouched maps , which adds two new models and a single player mode. Counter-Strike is a tactical shooter game that confronts terrorists versus counter-terrorists in round-based gameplay.

	Half Life 2
	46

Half Life 2 is a great first person shooter for Windows. The game is quite old by now, but it now is part of a trilogy. This is considered to be the First Episode. The second part is bundled in a game that is called The Orange Box. The graphics of this game were so spectacular back then that it was hard for me to run it. They look OK now.