Master Chief in helmet

1440 × 900

Halo ring on green hill

1280 × 959

Half-Life 2 promotional art

1440 × 900

Halo game logo and armor

800 × 600

Spartan with sniper rifle

1920 × 1080

Portal game icon

1500 × 1000

Team Fortress 2 main menu

1280 × 960

Portal game icon

1500 × 1000

Halo 3 ODST helmet close-up

1600 × 1200

sniper aiming at enemy

1680 × 1050

Portal game concept art

1280 × 1024

Aperture Science Laboratories logo

1024 × 600

Aperture Science entrance portal

1920 × 1080

Aperture Science logo

3900 × 3600

Borderlands game scene

1920 × 1080

Gears of War logo

1600 × 1200

Portal game cover art

1920 × 1200

Borderlands game logo

1680 × 1050

Silhouette of a Soldier — Green

1680 × 1030

Soldier in Jungle Armor — Green

1024 × 768