Half-Life 2: Episode Two

aliens zombies helicopter bloody gravity health first person shooter fps death robots keyboard doctor episodic sci-fi water vehicle steam achievements apocalypse undead artificial intelligence missile bugs dog electronic music terraforming mad scientist silent protagonist swimming hunter strider last stand alien invasion switch one-man army boss fight explosion cloud radiation steam achievements machine gun digital distribution xbox controller support for pc single-player only train rail track steam cloud jump male protagonists throwing weapons crate health pack robot dog episodic content bullet anti-personnel mine voice acting ladder log first-person perspective flashlight bink video human polygonal 3d turret explosives briefcase door original soundtrack release shotgun motion blur crouching wasd movement cardboard box window non-player character profanity descendants of other characters elevator mutilated corpse brain necktie pistol first aid kit retail games with steam activation lightning sprinting ragdoll physics checkpoints falling damage glasses resistance magnum crosshair grenade throwback subtitles auto-saving grenade cooking first person melee gloves heads up display useable vehicles environmental puzzles single-entity developer credits a.i. companion male antagonist instant kill infinite ammo hitscan difficulty level evade laser breakable glass facial hair quickloading unreliable narrator unusual speech patterns steam play valve whiteboard reloading exploding barrel sniper rifle stop sign scripted death level titles cheat code blood splatter gear destructible cover destructible environment totalitarian government the future scientist interactive environments radiator high dynamic range evolving title screen to be continued compass bar physics manipulation blunt weapons helicopter boss exploding gas tanks grenade source engine crossbow dystopian world hugging skyscraper particle system weapons swap disembodied voice plot twist evil organization interactive cutscene light bloom linear gameplay phong shading fuel tank agents flare space nazis in-engine cinematic levitation crouch jump enemy reaction muzzle flash submachine gun havok physics light up crosshair barricade crowbar cinder block revolver garden gnome gas cylinder body armor circle-strafing rifle scripted events vent crawling laser sight giant enemy crab knock back gnome ricochetting projectile pov cutscene first-person platforming charging heavyweight enemies balance platforms character models based on actual people enemies on cover art gas mask jumpsuit headshot alternate fire sweeping vista escaping imprisonment developer console shotgun shells run 'n gun air duct crow mysterious ally living collectible ammo fully customizable controls biotechnology developer commentary trilogy foreshadowing secondary weapons degraded boss dropship automated sentry gun muscle car skybox cliffhanger lab coat goatee insect infestation no clip persistent bullet holes ammo box corpse spasms strafing strafe-jumping environment as weapons tragic hero short jacket super suit funicular hairband rapid fire dynamic difficulty peg leg machinima comic relief gradual enemy introduction alphabetical and numerical numbers in a title wormhole professional gaming spas-12 mp7 vortigaunt headcrab barnacle novint falcon support hev suit tractor beam collecting items using weapons impaling weapons gunship normal mapping ominous sky sticking no scope southpaw defend x for y amount of time drum can stepping on bugs colt python geiger counter pulse rifle gal friday buddy system speed blur cutscene dissonance xfire zero-point energy field manipulator antlion hidden parasite ears ringing the combine magnusson device wound tags plywood antlion guard advisor portal storm zombine rollermine borealis larval extract hunter-chopper