A large, sprawling level, with several open arena-like areas, lots of stairs, and some funky tighter passageways. Ammo and especially weapons are a little tight... but 3 or 4 should have no trouble at all.

Documentation for the Marathon Map Exporter. Contains info on exporting to various 3D games (including a few upcoming ones), and some discussion of the evolution of 3D games. Worthwhile reading for anyone looking beyond the Marathon universe for first-person-shooter games.

Detailed information on reactivating (or activating, depending on your view) the unused slots available in the M2/Mi Sounds file. This is a great way to add new sounds, without losing what's already there. The doc mentions that you can see the technique being used in "M1->Mi Hunter conversion patch that this doc is bundled with"-while the patch does have these docs bundled, this version is just the docs. If you want the patch, you need to get it from the Alterations section.

A small arena with a surrounding corridor, and a subterranean waterfilled network of access tunnels. Nice attention to detail, but there are two problems. The tunnels are pretty long, with no exits other than at the ends, which makes it easy to get trapped (I'm not really fond of underwater netmaps, anyway), and the weapons/ammo are really light. More than 2, and you're gonna be duking it out with bare fists.