Steam link: https://store.steampowered.com/app/220/
Short Description: 1998. HALF-LIFE sends a shock through the game industry with its combination of pounding action and continuous, immersive storytelling. Valve's debut title wins more than 50 game-of-the-year awards on its way to being named "Best PC Game Ever" by PC Gamer, and launches a franchise with more than eight million retail units sold worldwide.
Platforms: Windows Mac Linux
Release: Nov 16, 2004 (16 years, 10 months ago)
Tags: Action Adventure Aliens Atmospheric Classic Dystopian First-Person FPS Great Soundtrack Horror Moddable Multiplayer Physics Puzzle Sci-fi Shooter Silent Protagonist Singleplayer Story Rich Zombies
Revenue Estimate: ~$19 million