Retronauts Episode 37 (02/28/2008)[permanent dead link] at 1UP.com. Bruce Morrison at 00:52:06: "Speaking of the multiplayer, like, deathmatch-style, we do have a content pack in the works for Marathon, which will be taking some stuff from Infinity and bringing it over. Things like [the maps] Duality, Beyond Thunderdome, [and] a couple of Jjaro levels".