The path to getting this map was quite different, but well worth it. A 5 level solo map that really is quite nice. Through the use of Anvil, you get the best of all three Marathon's. The buffers, switches, etc...are a combination of Marathon 1 thru Infinity. Almost all of the levels have good flow and there are interesting tricks on each level. Puzzles aren't too hard to figure out, and visually some really nice moments. Physics models help out on some of the levels with some ammo and weapon enhancements and at times you'll have memories of Marathon 2. (which I appreciated) Well worth your time...make sure to play it on Major Damage or above.