Modifications and Add-Ons
Alien Vendetta, Antichrist Doom maps, Arenas2 Doom2 wad, Co-Op Tested Doom II Maps, Cyb's Doom Junk, DarkWolf's Doom Page, Doom Heaven, Doom II Deathmatch, Dr. Iguana's Doom II Stuff, Dracula Doom
Reviews and Previews
Doom II for Game Boy Advance at GameSpot, Doom II for PC at GameSpot, Gamer's Hell, GameSpy Review
Doom2.net
Beginner guides, detailed game information, deathmatch tips, add-on levels and demos.
Dr Deathmatch's Doom II Site
Wads, tips for setting up and playing deathmatch games, cheats and links.
id Software Doom II
Official site. Description, system requirements, technical support contacts and online purchasing.
My Doom II Page
Fan site with general information and a few wads.
Sergeant Jms's Doom2
Includes a table with the shots necessary to kill each monster, the music for the levels in MIDI format, the ammo carrying capacity, weapons descriptions, items explanation and cheat codes.
wackyhq
Home to DeCorEd, a lump editor for ZDoom, and Dark Forces Doom, a new total conversion project. Also has discussion forums, add-on reviews, demos and downloads.