Related to Portal concept on beach

Stick Figure Falling — White, Neutral

1920 × 1200

Weighted Companion Cube — Black

1280 × 800

Puzzle Game Icons

1024 × 768

Now You're Thinking With Portals

1440 × 900

Companion cube in a test chamber

1680 × 1050

Login screens for Black Mesa and Aperture Science

2880 × 900

Aperture Labs wanted poster

850 × 1100

Turret Sentry Robot — Black, Dramatic, Digital Art, Laser Beam

1280 × 1024

Chell and robots in a test chamber

1024 × 768

Silhouette of a Robot — Black, Dramatic, Digital Art, Text

1920 × 1200

Silhouette of a Robot — Black, Dramatic, Serious

1920 × 1080

Companion Cube dialogue

1920 × 1200

Robot in Puzzle Room — Gray

1337 × 1094

Scientist in a bathtub

1280 × 1024

Robot in Puzzle Room

1280 × 1024

Robotic Test Chamber

1920 × 1200

GLaDOS and Companion Cubes

1680 × 1050

Spaceships near a portal

1600 × 1200

Halo 3 Logo and Ships — Blue

1280 × 1024

Characters from a Video Game — Blue, Dramatic, Digital Art, Video Game Characters, Portraits

1600 × 1000

space strategy game interface

1280 × 1024

Characters from a Video Game — Gray, Dramatic, Digital Art, Soldiers

1600 × 1200

Half-Life 2 game environment

1024 × 768

Alien Creatures in Conflict

1600 × 1200