Three levels, all originals (the counterparts of M2-Suicide 18). The first one is just as aptly named as its M2 counterpart, but the other two provide some serious carnage opportunities. Learning the teleporter positions on Walking Charlie is a huge advantage...

Four maps, none of them really playable. They're mostly idea maps... sort of trying out new architectures. A couple would make nice additions to existing maps...

A huge pit, with a ring around the outside. Bobs galore, mostly just for killing...

A large arena, with lots of running room. There are also several narrow passageways around the outside, which provide access to sniper positions... The jug and the MADD keep things interesting for solo play. Size comes from an included sound clip.

Two maps. Party is 4 big rooms, LIve at London is a ring with sniper ledges and a central recharge area. Weird smearing because of a no-thickness wall...

A pretty nice-looking net level-quite bright, good flow-but no weapons. (Well, there's one spanker, and ammo for it, but...)

A pretty incredible 26-level scenario from a Danish mapmaker. Quite a bit of new art, as well as art "borrowed" (with credit) from other work... The storyline is conveyed in chapter screens-the terms you find simply contain the secret terms from the original Marathon, in case you missed them the first time around. Some unpleasant tricks are here (save whenever you get the chance, since there are more than a few dead ends), and some silly stuff (pictures of naked women in the marine jail cells, the bobs are now boobs (and pretty well done, too), that sort of thing)

13 maps. Eight are already here, as Vertigo Maps. The other 5 are worth the download... generally, interesting-looking maps. (Some look better than they play.) One of these will make you go blind if you play it too long...

Very simple, but it plays well. High carnage with anything more than 2...