games with unique concepts

i love unique games.. new experiences in games included...

thought I'd share 2 of my favorites.. feel free to add.. im sure i will XD

portal
mirrors edge

Apparently there was a 2nd person Shooter, where it was done using multiple surveillance cameras.

cool there's actually a few of em from what i could find.. but this one i think has a download link on the site..

http://www.we-make-money-not-art.com/archives/2005/08/for-a-few-years.php

anyway i haven't downloaded this file so cant vouch for it... but if you have time, check it out!