Concrete Wall with Graffiti

1280 × 1024

Aperture Laboratories Logo — Black, Surreal

1280 × 1024

Aperture Science Logo — Blue, Technological

1440 × 900

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

1280 × 1024

Aperture Logo — Blue

2560 × 1600

White Spherical Robot — Curious

1024 × 768

Chell Falling in a Test Chamber

1600 × 1200

Stick Figure Falling — White

1680 × 1050

White Silhouette of Character — Black, Dramatic, Digital Art

1600 × 1200

Aperture Science logo and slogan

2560 × 1600

Portal game wall graffiti

1920 × 1200

Companion cube reminder

1280 × 1024