Master Levels
Titan gives its name to two maps in Master Levels for Doom II (and in Doom II Enhanced) and in later remixes of those levels Final Doom (PlayStation), Final Doom on Xbox (Resurrection of Evil bonus disk), Final Doom on PS3 (Doom Classic Complete) and Doom I + Doom II.
An (most likely unofficial) description for one of these levels (which doesn't appear in later rereleases or remixes) states:
- A strange and enigmatic building on a moon of Saturn contains the latest in alien weapon technology. If you can survive the guards and solve the puzzles, the Federation will leapfrog in technology. It's all up to you. Oh and watch those windows!
The mention of Federation is probably a Star Trek reference?
The description for the second level in the series:
- Every step you take may be your last. If it looks too easy, it probably isn't. Good luck - you'll need it <G>.
Doom 64
Though not mentioned directly... Since it includes an unnamed space installation set after Doom II in some backstories (see Doom 64 (PC backstory)) this is yet another possible location he may have returned to since it gave its name to a base in Master Levels for Doom II in the PC version.
Doom (2016)
In Doom (2016)/Eternal are references to a company named Titan Off-Planet Construction.
Fan Content
- The Titan Series
- Titan (WAD) (and Titan 2)
- Titan 1024
- Ascent on Titan
- Escalation Titan