My post title doesn't totally match my intention, but it's the contortion of the common phrase that counts. Anyway:

A few months back, I finally played a classic video game (that was bundled with a video card I bought); Deus Ex. I was thrilled at the new gaming opportunities created by allowing for non-lethal tactics (which I discovered on a website before I fully realized it in the game). After sliding through the game half stealth / half lethal, I'm trying again fully non-lethal for a whole new challenge.

Question is: Are there any others games that provide this flexibility and freedom of game play? I'm guessing the Thief series, since it's on the same engine, but any others? New or old (preferably older so I can run them on my current "trusty" Windows 95 install).

Off I go to sieze a rare moment of free time for some gaming!