A massive demonic invasion has overwhelmed the Union Aerospace Corporation's (UAC) Mars Research Facility, leaving only chaos and horror in its wake. As one of only a few survivors, you must fight your way to hell and back against a horde of evil monsters. The path is dark and dangerous, but you'll have an array of weapons--including a pistol, a chainsaw, grenades, and more--to use for protection.
OS: Microsoft® Windows® 2000/XP (Does not support Windows Vista/7)
Processor: Pentium®IV 1.5 GHz or Athlon® XP 1500+ processor or higher
Memory: 384 MB RAM
Graphics: 100% DirectX® 9.0b compatible 64MB Hardware Accelerated video card and the lateset drivers
Storage: 2.2GB of uncompressed free hard disk space (plus 400MB for Windows® swap file)
Directx: DirectX® 9.0b (included)
Sound card: 100% DirectX® 9.0b compatible 16-bit sound card and the latest drivers
To activate the game, you need a Steam Account
Login or register at the official Steam Website and download Steam client
Install and start application, login with your Account name and Password
Click the Games Menu.
Choose Activate a Product on Steam...
Follow the onscreen instructions to complete the process
After the successful code verification, go to the "MY GAMES" tab and start downloading.
News & Updates
2025-12-13
Test Your Gaming IQ with YUPLAY and Win
As the holiday season is already nearly here, we prepared a special Christmas Giveaway that would let you test your gaming IQ with YUPLAY and win some awesome prizes while doing it! Make sure to regularly check and follow our YUPLAY X profile in order to be in the know about any possible chances to participate and enter the Christmas Giveaway in a timely manner. Are you up to the challenge and ready to guess some great gaming titles?
Dive Into 2025’s Most Addictive Video Games – Part 2
As you probably know, we separated the most addictive video games blog into 2 dozens of Steam games in almost all of the main gaming genres, so there should be something for everyone to enjoy on it! Now we are here to continue our list and if you checked out the first part of it, you know we made sure to discuss some of the top hit games that recently got released. We assure you there will not be bad titles in the second part as well, so let’s head over to the first entry in part 2 immediately!