If you are into retro games, these are the ones you need to play.
Be thankful you can download them and don't have to sit there and put in 16 3.5-inch floppies.
I found this game to be buggy back in the day. It had an interesting concept, but the weapons were bad and difficult to use, the gameplay was overly difficult -- to the point where it was impossible to figure out the solutions to puzzles, etc.