Nitemare-3D

The Good
It's fun, and that's what games are supposed to be, right? It is certainly difficult, and the music was rather catchy and enjoyable, and I would say the soundtrack is the best element in this game. It does get annoying after a while, though, they really should have had many more different songs for the levels. I also always admire (this aspect of ) a game that has a decent-length demo. Nitemare 3D has a good length demo. Heck, it takes a while to beat!

The Bad
Gray ceilings, and this is not the only game to feature that. It was definitely not the classic that other FPS(s) are, but it is still fun. However, if you play the demo, since it is so lengthy, unless you're really, really hooked, (and I doubt you would be this crazy) I would not recommend trying to purchase it, as it is rare, and you could get a better game for cheaper. (probably)

The Bottom Line
Not you're average FPS. (I mean that in a slightly demeaning way) Fun, if you can get it free, it's not worth you're allowance, though.