Related to Ninjas and portals

Silhouette of Ninja and Bird

1024 × 768

Portal caution sign

1920 × 1200

Portal characters introduction

1920 × 1200

Silhouetted Ninjas — Black, Humorous, Illustration, Text, Silhouette

1280 × 800

Aperture Science Sign — Gray

1920 × 1080

Stick Figures with Text

1280 × 1024

Robotic Spheres

1369 × 1133

Cave Johnson's lemon rant

1920 × 1080

Woman with Portal Gun

1920 × 1080

Portal gun with fiery portal

1280 × 1024

Cake Slice with Cherry

1440 × 900

Cat in a Maze

1280 × 1024

Aperture Laboratories Logo — Black, Dramatic, Digital Art, Text, Blue

1280 × 1024

Aperture Laboratories Logo — Black, Dramatic, Digital Art, Text, White

1920 × 1020

Companion Cube — Green

1920 × 1200

White Cube with Heart Symbols — Gray, Dramatic

1920 × 1080

Blue Aperture Symbol

2560 × 1600

Blue Screen Error — Dramatic, Digital Art

1600 × 1200

Aperture Laboratories Logo — Black, Dark, Digital Art, Text, Green

1440 × 900

Companion Cube with Heart — Pink, Playful, Illustration

1366 × 768

Cube with Heart Symbols — Beige, Neutral

1280 × 1024

Cube with Heart Symbols — Beige

1281 × 1024

Aperture Science Test Chamber — Black

1370 × 747

Companion Cube — White

1920 × 1200