I found this game today while looking through Stardock's Impulse service, which is basically like Steam but less well-known, not as good, and covered in the bacon-y stench of Europe. Anyway, it was free so I downloaded it. The game is clearly inspired by Portal, complete with disembodied voice telling you what to do, starting the game inside a research facility, that squeaky-clean research facility/hospital look, and the overall puzzle-oriented gameplay set in a first-person world. But, where Portal used, well, portals to solve puzzles, Prometheus uses a sort of time-travel mechanism to create several different version of yourself to solve puzzles.
For example: there are three buttons on a wall. All three need to be pressed simultaneously to gain entry. You run up and press then first button. Then, warp back to the beginning point and do it again. Then again. On the fourth go, you watch as all three of your previous selves run up to the buttons and press them, thus allowing your fourth version to walk through the door. Of course, the actual puzzles are a bit more complex than that.
Overall, it's a really fun game, intriguing game and
free. Apparently it's free because it was an entry in Epic Game's Make Something Unreal contest.
Here's a video:
[youtube=560,345]ZFOSvllWCC0[/youtube]
You can download it through Stardock's Impulse service or through here:
http://www.fileplanet.com/200335/200000/fileinfo/Unreal-Tournament-3---Prometheus
