Portal game logo

1280 × 960

Portal game title screen

1920 × 1080

Portal game logo

1440 × 900

Portal game logo

1920 × 1440

Portal game logo and tagline

1680 × 1050

Portal game logo

1280 × 960

Aperture Science logo

2560 × 1600

Aperture Laboratories logo

1440 × 900

Aperture Laboratories logo

3840 × 1080

Aperture Laboratories logo

1917 × 1036

Gehn's Lab Journal

1920 × 1200

Portal gun with fiery portal

1280 × 1024