Aperture Science Logo — Gray, Industrial, Digital Art, Atom Symbol

2560 × 1600

Woman in Hooded Jacket — White

2560 × 1600

Aperture Laboratories Logo — Gray, Dramatic, Digital Art, Concrete Wall, Black

2560 × 1600

Graffiti Text on Wall — Gray

1600 × 1000

Half-Life 2 vehicle concept art

1280 × 1024

Half-Life 2: Episode Three concept art

1920 × 1200

Aperture Laboratories Logo — Black, Dark, Digital Art, Text, Concrete Wall

1280 × 1024

Half-Life 2 weapons and character

1024 × 768

Three Figures with a Dog

1920 × 1080

Skater with Spray Can

1024 × 768

Half-Life characters in futuristic gear

1440 × 900

Half-Life 2 Scientist Art

1280 × 1024