Mars War has great level design, perfect soundtracks, and is overall a fun experience. This is without a doubt my favorite megawad and I would highly recommend it to pretty much anyone (unless misaligned textures REALLY bug you)
It's insane that this was made in 1994. The level of detail, atmosphere and feeling of exploration is simply unmatched by anything from that era. And not only that, but it actually feels like a real place.
Absolutely stellar stuff; I highly recommend this to everyone, including modern players who don't typically play old stuff. You'll be blown away.
Technically the first map sets in real life university, or at least the first officially accepted as one of those kind of maps. The map Is pretty complex and some areas are neat for a map made in 1994, big open structures with some good simple details in It, the layout Is intricate and good, expect for a pair of dead rooms hunting for keys and other goodies, but it's a good way to tell the player to explore the place. The only big issue is the yellow key door in the main courtyard area that doesn't open (at least in Woof port, the "latest" release) for some weird reason. Good stuff btw.