Borderlands 2 and Borderlands: The Pre-Sequel are playable on SteamOS
Borderlands 2 is now available for SteamOS and Borderlands: The Pre-Sequel will be released for it at a later date.
Those wanting to pick Borderlands 2 up for SteamOS testing or just because they don't own it yet, can grab it for 75% off until October 2.
Borderlands: The Pre-Sequel will arrive on Steam when it releases October 14.