We tested Steam Controller and it works like a charm =) The following controllers are supported by Massive: Amazon Fire Game controller and remote. Android TV controller and remote. Apple MFi controller on iOS 7 and above. Executioner X on Windows and Mac. GameStick on itself and on Linux. Google Nexus Player controller and remote. Green Throttle Atlas on Android. Hama Black Force on Windows. Logitech F310 on Windows, Mac and Linux. Logitech F510 on Windows, Mac and Linux. Logitech F710 on Windows, Mac and Linux. Logitech WingMan on Windows. MaxFire Blaze5 on Windows. Moga Pro on Windows, Mac and Linux. Natec Genesis P44 on Windows. NVIDIA Shield on Android and Windows. OUYA Everywhere (supporting all controllers the OUYA SDK supports). OUYA controller on Windows and Linux. PlayStation 2 controller on Windows (with adapter) PlayStation 3 controller on Windows, Mac and Linux. PlayStation 4 controller on Windows, Mac, Linux and Android. PlayStation 4 console. PlayStation Vita / PSM. Samsung GP20 on Android. Speedlink Strike on Windows and Mac. SteelSeries Free on Windows, Mac and Linux. Valve Streaming Gamepad on Windows. Xbox 360 controller on Windows, Mac, Linux and Android. Xbox One controller on Windows and Mac. Xbox One console. A variety of Xbox 360 clones are supported. Some generic Android controllers are supported. Some generic Blackberry controllers are supported. Keyboard and Mouse support. XInput support on Windows (with rumble!)

• Full Controller Support;
  
• Online Cross-platform Multiplayer
  
• Online Chat (Cross-platform)
  
• Randomly-generated levels, enemies and itens
  
• Big Bosses
  
• Gun Brothers features the awesome genres like Rock, Eletronic Music and Orchestral

• OS: Linux or SteamOS
• Processor: 2 GHzMemory: 2 GB RAM
• Memory: 2 GB RAM
• Graphics: 256 MB

• OS: Linux or SteamOS
• Processor: 2.9 GHzMemory: 2 GB RAM
• Memory: 2 GB RAM
• Graphics: 1 GB