Half-Life game title screen

1280 × 1024

Portal Gun Firing

1680 × 1050

Hand Holding Grappling Hook

2560 × 1080

Half-Life 2 Episode Two menu

1600 × 1200

Anticitizen One incursion

1131 × 707

Half-Life 2: Combine

1280 × 1024

Robotic Arm in Lab — Gray

1920 × 1080

Space Station on Asteroid — Black

1545 × 600

Spaceships in Orbit — Blue, Dramatic, Night, Digital Art, Planet, Space Station, Moon

1600 × 1200

Silhouette of a Person — Black, Dramatic, Digital Art, Red Stripe, White Silhouette

1920 × 1080

Person Entering Portal

1500 × 1000

First-person View of Portal Gun

1440 × 900