Related to Cave Johnson's lemon rant

Spartan Soldier Helmet — Black, Dramatic

1920 × 3074

Hand Grenade

1280 × 808

War never changes

1280 × 800

Mario graffiti art on grunge background

1920 × 1200

Pac-Man hate quote

1000 × 1000

Assassin's Creed quote wallpaper

1600 × 1000

Cave Johnson quote from Aperture

1440 × 900

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

1440 × 900

Portal game quotes collection

3000 × 1800

Portal game quotes

1024 × 768

Stick Figure Drowning — White, Humorous

1280 × 1024

Text on Black Background — Mysterious, Digital Art, Code-like Text

2048 × 1152

Portal game quotes collage

1280 × 800

lemon grenade concept

1920 × 1080

Portal Game Logo — Black, Minimalist, Vector Art

1920 × 1200

Portal caution sign

1920 × 1200

Portal characters introduction

1920 × 1200

Cat in a Portal Maze

1600 × 1200

White Robot with Red Light — Gray, Calm, Digital Art, Red Heart

1440 × 900

Weighted Companion Cube — Black, Dramatic

1280 × 800

Slice of Cake with Cherry — Black, Mysterious

1440 × 900

White Robot with Red Light — Gray, Minimalist, Digital Art

1440 × 900

Stick Figure Falling — Black, Dramatic, Digital Art, Stick Figure, Portal, Text

1280 × 960

Silhouette Ninjas with Portals

1280 × 800