The most likely I can find is
Microsoft Train Simulator as suggested on
filext.com.
Where did the file come from? Any program could choose to use that extension for a Title file or similar (such as the MIDI file listing program
here. Also, remember that filename extensions can readily be changed, and therefore don't have to define the contents of the file. For example a
.txt file becomes a
.tit file just by changing one letter.
Seems there's also a Mod installer for EA games called
Total installer Thingy that uses .TiT files.
Edited by Platypus, 22 December 2008 - 02:38 AM.