How to get it working
Sometimes it helps to launch the exe directly, sometimes it is better start through Steam.
You can also try right-clicking and run as administrator. Or copy the dll files into the Binaries folder in the game directory.
Good to know
- Launch "MirrorsEdge" from "mirrors edge/Binaries". If that does not work, copy d3d9.dll and libfreespace.dll from Perception into the Mirror's Edge Binaries directory.
Buy Mirror’s Edge on Steam