The Steam client by Valve software is now in the Kwheezy repository.
The Steam for Linux client gives you access to games in the Steam Store.
To install, open Apper and apply updates. Then type "steam" in the search field. The package is called "steam-debian".
The steam-debian package is courtesy of Keith Henderson AKA GhostSquad57. It was he and possibly the work of others that ported the steam client from Ubuntu to Debian Wheezy.
I've tested it with Nvidia proprietary drivers that come with Kwheezy (the Debain Wheezy version) and it seems to work great so far. Even on ...