Does blowing away pigcops, destroying entire buildings, and shooting your way through an adult XXX store sound enjoyable? Then you'll love Duke 3D. (Note: There isn't actually anything X-rated in the game.) Uses the "Build" engine, which is still similar to the old Wolf3D engine in that there are no rooms on top of other rooms, but it's been tweaked and pushed to the max. Lots of fun! (Note: Several people have emailed me to comment that there ARE rooms-above-rooms in Duke3D. While the effect of rooms-above-rooms can be _simulated_ in Build, there are never really any rooms on top of other rooms in the game, and thus it's not truly 3D.)