Woman Holding Portal Gun — White, Action

1920 × 1080

Four Characters in Armor — Red, Aggressive

1600 × 1200

Four Characters in Armor — Red

1600 × 1200

Two Robots in Motion

1680 × 1050

Man and Woman in Futuristic Gear — Gray

1440 × 900

Portal 2 Logo — Gray, Minimalist, Digital Art

1680 × 1050

Armored Soldier in Jungle — Black

1600 × 900

Four Characters on a Vehicle

1920 × 1200

Two Anime Characters in Lab

1131 × 707

Half-Life 2 Logo — Brown, Dramatic

1024 × 768

Soldier in Green Armor — Black

1920 × 1200

Floating Star-shaped Object

2560 × 1080