Terror from the Deep

Combase: Nova - http://www.geocities.com/Area51/Rampart/5504/combase1.htm
Offers fan fiction, game information, and message boards.

Game Revolution - http://www.gamerevolution.com/oldsite/games/codes/sony/xcomterror.htm
Some cheats for the version on the Playstation.

GameWinners.com - http://www.gamewinners.com/DOSWIN/blxcomterrordeep.htm
Offers a cheat for the DOS/Windows version as well as links to strategy guides.

Title - http://www.franken.de/users/speedy/hakan/hobbies/games/tftd/Welcome-e.html