Black Mesa logo on dark background

1280 × 800

Twilight War logo with planet

1024 × 768

Portal logo on dark background

1192 × 670

Halo symbol logo

1600 × 1200

N7 logo on carbon fiber

1920 × 1200

Aperture Laboratories logo

1920 × 1200

Aperture Laboratories logo

1920 × 1080

Aperture Laboratories logo

6000 × 1800

Aperture Laboratories logo

1280 × 1024

Aperture Laboratories scene

1920 × 1080

Portal Gun from Aperture Science

1920 × 1200

Thermal Discouragement Beam diagram

1920 × 1080

Portal game concept on beach

1440 × 900

Portal game concept on beach

1280 × 1024

Portal game advertisement

1280 × 1008

Repulsion Gel Testing Element

1920 × 1080

Chell from Aperture Laboratories

1080 × 1440

Aperture Laboratories logo with graffiti

1024 × 768

Aperture Science Handheld Portal Device

1200 × 670

Aperture test conclusion screen

1920 × 1200