One of the very first first-person shooters.
Seeing as how the game is from '93, you're not going to get the best graphics. I'd say as of right now, that would be the biggest setback. The sound is great for an early 90's release. The gameplay is by far the best aspect of the game.
Once you get into it and used to everything, you develop that sort of "paranoia" you get when sometimes playing first-person shooters. This is one of the first games ever to create that feeling. The bottom line is this is THE first-person shooter game prior to Doom. If you haven't played Blake Stone, I suggest you try to find a way to.