Pretty good. This is a FPS. The graphics are old but still decent. The music is awesome. The story is Okeish, just a few cutscenes to tell a little tale about death, vengeance, and some hell.

No bugs but it crashed a couple of times.

Overall, very entertained. There are plenty of weapons to try and use. There are cards that provide different effects and abilities. Many levels and various difficulty settings, so it's long enough. The story is kinda full of cliches but it's not intrusive and it's just a gory tale to keep you going. There are some platformer parts that are unexpected and unwelcome. The music is heavy metal goodness, very adequate. I think this qualifies as a retro-gem, so kill some stress and some pixel demons, why won't ya?