I'm trying to run the game on Windows 7 with no luck. Which I find weird because I ran Thief GOLD (gog) and Thief II (Steam) perfectly.

When I load it up the game messes with the resolution of my laptop and then crashes when I try to start a mission. Help please, I miss this game :/

it's because (no matter how ridiculously it sounds) Thief and Thief2 are currently more compatible with new machines than Thief3. anyway, try this: http://www.ttlg.com/forums/showthread.php?t=138607

weird. have the steam version and only installed the widescreen mod called t3 sneaky update.

works without issues win 7 64bit.