Thief 2 has not aged terribly well. I’m usually not one to complain about dated graphics, but in this case they affect the game. A core mechanic is hiding in the shadows, so when the game engine can barely render a shadow you’ve got a problem. I would plan my movements based on scurrying between dark areas only to discover that I would be running through a brightly lit hallway. There is probably a mod out there somewhere that fixes all this.
The guard AI is pretty janky too. Sometimes you could just clop around in your tap shoes and the enemies would be none the wiser, but then other times you’d turn your head and trigger their alerted state. Eventually I got used to just walking in a slow crouch all the time to avoid them.
There is a bit of a story here which is told as inter-level cutscenes. It’s not bad for what it is (sloppy amateurish art and all) but for some reason the main baddie is voiced in that Howie Mandel baby voice. So goofy.