http://www.nothingtohide.cc/
Nothing to Hide is an anti stealth-game where you have to be visible at all times and you're responsible for your own surveillance. It's pretty cool.
It's currently a demo with 8 levels, but a really cool concept. The demo is fully playable and tells a complete story, it's just a bit short.
The development was abandoned years ago, but at least it's fully playable and everything is released under CC0.