Anybody out there that's still disappointed by the Rise of the Triad remake can finally get together with other retro-junkies for some group therapy. Duke Nukem 3D: Megaton Edition now features cross-platform multiplayer, featuring both a versus mode and co-op for up to eight players.
Also, DN3D:ME happens to be 60% off on Steam right now- so not only will you get all of the original maps, but you'll also get all of the user-created maps from the Steam Workshop.