Steam link: https://store.steampowered.com/app/130/
Short Description: Made by Gearbox Software and originally released in 2001 as an add-on to Half-Life, Blue Shift is a return to the Black Mesa Research Facility in which you play as Barney Calhoun, the security guard sidekick who helped Gordon out of so many sticky situations.
Platforms: Windows Mac Linux
Publisher: Valve
Developer: Gearbox Software
Release: Jun 1, 2001 (22 years, 10 months ago)
Price: $4.99
Reviews: 13,760
Score: 9/10
Followers: 7,821
Tags: 1990's Action Adventure Aliens Atmospheric Classic First-Person FPS Great Soundtrack Moddable Old School Puzzle Retro Sci-fi Shooter Short Silent Protagonist Singleplayer Story Rich Zombies
Genres: Action
Revenue Estimate: ~$1.3 million