Keyboard/mouse or gamepad required
Internet Connection required for online activation.
This title installs and requires the Steam Client to play.
To activate your Product Code on Steam:
1) Open the Steam client, and click "Add a Game" in the bottom left corner
2) Choose "Activate a Product on Steam…"
3) Enter your Serial Key, and click "Next"
4) The Downloadable Content will be applied to your Steam Account