Developer(s)

Valve

Publisher(s)

EA Games, Valve

Genre(s)

Shooter, Puzzle

Platform(s)

PC (Microsoft Windows), PlayStation 3, Xbox 360, Linux, Mac

Keywords(s)

non-player character, one-man army, character models based on actual people, instant kill, run and gun, profanity, plot twist, motion blur, robot dog, professional gaming, crow, weapons swap, dog, wasd movement, robots, death, episodic, agents, male antagonist, tragic hero, bugs, radiation, original soundtrack release, zombies, vent crawling, helicopter, single-player only, evolving title screen, terraforming, doctor, balance platforms, vehicles, voice acting, fully customizable controls, unreliable narrator, falling damage, resistance, steam achievements, to be continued, evil organization, a.i. companion, machinima, human, silent protagonist, interactive environments, melee, biotechnology, cheat code, buddy system, difficulty level, scripted events, scientist, gnome, foreshadowing, particle system, environment as weapons, gunship, steam, auto-saving, escaping imprisonment, undead, descendants of other characters, mp7, mad scientist, alien invasion, steam play, useable vehicles, ragdoll physics, male protagonist, swimming, aliens, strafe-jumping, bloody, steam cloud, quickloading, linear gameplay, bink video, achievements, wormhole, insect infestation, explosion, artificial intelligence, checkpoints, cliffhanger, novint falcon support, apocalypse, developer commentary, gravity, polygonal 3d, in-engine cinematic, sprinting mechanics, retail games with steam activation, environmental puzzles, hunter, boss fight, digital distribution, comic relief, xbox controller support for pc, dystopian, physics manipulation, first-person platforming, dynamic difficulty, levitation, throwing weapons, destructible environment, trilogy, infinite ammo