I thought some of you might appreciate this: https://www.youtube....h?v=aEkscEFjgcU
I can't remember for sure, but I think Chaos Theory was the first stealth game that I really took to. I've since fallen in love with the genre, preferring 1st-person stealth titles like TDM. But I owe a lot to this game for getting me into the genre and showing me a style of gameplay that rewards patience and slower, careful, artful sneaking as opposed to frantic running & gunning. It's the slower, contemplative pacing of stealth games that I've really come to enjoy most of all, I think.
Sneaking around the environments is a real treat. It feels more like a Deus Ex game to me, though only as it relates to 1st person sneaking. I don't want to suggest that it's as open & varied an experience. You will need to pop out to 3rd person from time to time for certain interactions, hanging off of ledges, grabbing guards and disposing of their bodies, etc... I was successful at getting the main camera settings set up so that the entire game could be played in first person, but there were many show-stopping bugs, getting stuck in the environment, that sort of thing. I think it could be doable if the right values are tweaked to all of the camera settings throughout the .ini file, but it's a job for someone with a team or who has more time. As it is now, it's exceeded my expectations and I'm very pleased with the result.
If you'd like to try this yourself, instructions are included in the youtube description. It just involves replacing one of the .ini files in the program folder with one that I linked to. There are 2 options. The first was what I was using for the video, which has the default mouse settings where the X & Y axis are different values (not recommended). The 2nd includes what I refer to as a "fix" for this, so that the X & Y axis are the same. This is my preference and what I expect is the standard for most games. You will also need to create a new profile and start a new game. Keep that in mind if you want to make any of your own tweaks. Once you're in game, press the key for weapon-aim and you'll be in first person. I'd also recommend using the fix for modern resolutions and set the fov to taste.
If you have even a slight interest, I suggest you give it a try. Please use at your own risk, but certainly don't hesitate to let me know if you have any questions.
p.s. Coincidentally, Chaos Theory is part of the humble Ubisoft bundle right now. You have to pay for the 2nd tier to get it, though.