Two notes on using Steam...
1) You need the latest version of the Endless Platform, which can be updated from the "Updates" page of the app center. If you see an error that you are missing 32-bit libraries, this means that you do not have the latest version of the Endless Platform. (And, at the moment, we don't automatically update the platform when the Operating System is updated.)
2) We just fixed a couple important bugs in the Steam application last night. If you installed Steam earlier this week, please check again for updates to Steam in the app center. This update fixes problems logging in under some circumstances, and is needed to properly display graphical textures in some games such as Team Fortress 2.
See the following for more tips regarding Steam: