Aperture Science workstation

1920 × 1080

Companion cube with Rubik's cube

1024 × 768

Weighted Companion Cube — White, Neutral

1680 × 1050

Portal robots in a test chamber

2700 × 1800

Birthday Cake on Table — Brown

1920 × 1200

Chocolate Cake on Table — Brown, Dark

1280 × 960

Portal in Wall — Gray

1920 × 1200

Cat in a Portal Maze — Purple

1600 × 1200

Companion Cube — Black

1280 × 1024

Companion Cube — Gray

1680 × 1050

Hands Holding a Cube — Black, Neutral

2400 × 1920

Companion Cube — Green

1920 × 1200