The last version for Marathon 1. Changes aren't documented, but seems to be mostly pallette changes (there's now a Texture popup!). If you've got the space, definitely worth having around.
Three maps, 5 levels. One three-pack, normal. The other two are variations on the same map. They both require the textures from the Canyonlands package, and the second one was designed with the Dogs of Pfhor package, as well.