Comment by ronjouch

To Thief heads who played I and II and want more of it: play The Black Parade, an enormous mod 7 years in the making that is actually an entire new game.

New gigantic maps full of secrets, style faithful to the original, weird universe, new story with cutscenes and voice acting. https://www.ttlg.com/forums/showthread.php?t=152429

I am not affiliated, just a fan.