Companion Cube with hearts

1200 × 960

Portal Gun Device

1280 × 1024

Darth Vader with Lightsaber — Black, Dramatic, Night, 3d Render

1200 × 750

Robot and Children in Cockpit

1262 × 886

Half-Life 2 title screen

1600 × 1200

Mechanical Structure Interior

1200 × 900

Portal gun from Aperture Science

1200 × 750

Portal 2 game artwork

1600 × 1000

Portal 2 Companion Cube

1600 × 1000

Robotic Superhero Character

1024 × 768

Robot in Ruined City — Gray, Dramatic

1200 × 750

Optimus Prime Robot — Blue, Dramatic, 3d Render, Shield

1200 × 900

Robot Mech in Spotlight

1024 × 768

Anime Girl in Black Dress — Dark, 3d Render

1920 × 1080

Robotic Villain Character

1024 × 768

Half-Life 2 logo

1024 × 768

Three Game Characters

1366 × 768

Female Character with Blonde Hair — Purple

1024 × 743

Halo 2 alien landscape

1280 × 1024

Optimus Prime robot character

1600 × 1000