The online multiplayer mode of Modern Warfare 2 retains the same experience points and unlockable reward system as that of Call of Duty 4, with game modes that include Free-For-All, Search & Destroy, Demolition, Sabotage, Domination, Team Deathmatch, and Capture The Flag. Modern Warfare 2 introduces several new features. Aside from new weapons, equipment, and perks that upgrade to "pro versions" after meeting utilization requirements, t...

Grand Theft Auto IV is an open world action-adventure video game published by Rockstar Games, and developed by Rockstar North. GTA IV is composed of elements from driving games and third-person shooters, and features open world gameplay, in which players can interact with the game world at their leisure. Grand Theft Auto IV also features several online multiplayer modes. Quite like its predecessors, the core gameplay of GTA IV consists ...

“Developed by series creator Rockstar North and set in Liberty City, Grand Theft Auto IV: The Lost and Damned features a new main character, Johnny Klebitz, and plot that intersects with the storyline of Grand Theft Auto IV. Players will also experience new missions that offer an entirely fresh way to explore Liberty City with new multiplayer modes, weapons and vehicles and a diverse soundtrack with additional music—all with the incredib...”

Steam is a digital distribution, digital rights management, multiplayer and communications platform developed by Valve Corporation. It is used to distribute games and related media online, from small independent developers to larger software houses; Valve expanded the service to include non-gaming software. Steam provides the user with installation and automatic management of software across multiple computers, community features such a...

Counter-Strike: Source is a first-person shooter video game developed by Valve Corporation. It is a complete remake of Counter-Strike using the Source game engine, as well as being the first game to use the engine. As in the original, Counter-Strike: Source pits a team of counter-terrorists against a team of terrorists in a series of rounds. Each round is won either by completing an objective (such as detonating a bomb or rescuing hosta...

Day of Defeat: Source is a team-based first-person shooter multiplayer video game developed by Valve Corporation. Set in World War II, the game is an updated version of Day of Defeat, moving from the GoldSrc engine used by its predecessor to the Source engine. Day of Defeat: Source is set in World War II, specifically the European Theatre in the year 1944. Players choose to join the forces of either the United States Army or the German ...

Portal is a first-person puzzle-platform video game developed by Valve Corporation. The game primarily comprises a series of puzzles that must be solved by teleporting the player's character and simple objects using "the Aperture Science Handheld Portal Device", a device that can create inter-spatial portals between two flat planes. In Portal, the player controls the protagonist, Chell, from a first-person perspective as she is challen...

Team Fortress 2 is a team-based first-person shooter (FPS) multiplayer video game developed by Valve Corporation. It is a sequel to the original mod Team Fortress based on the Source engine. Team Fortress 2 is distributed online through the Steam system, while retail distribution was handled by Electronic Arts. Team Fortress 2 is the first of Valve's multiplayer games to provide detailed statistics for individual players.

Portal 2 is a first-person puzzle-platform video game developed and published by Valve Corporation. The retail versions of the game are distributed by Electronic Arts, while digital distribution of the Windows and OS X versions is handled by Valve's content delivery service, Steam. Portal 2 mainly comprises a series of puzzles that must be solved by teleporting the player's character and simple objects using the "portal gun", a device t...

Zombie Panic! Source is a multiplayer Half-Life 2 first-person shooter modification and features four modes of gameplay, Zombie Panic! Survival mode, Zombie Panic! Objective mode, Zombie Panic! Hardcore mode, and ZPA mode.