Requirements

Mac

Minimum Requirements
OS
Mac OS X 10.11
Processor
Intel 1.8 GHz
RAM
4GB
Hard Disk
15GB
Graphics
512MB
Input
Keyboard & Mouse
Recommended Requirements
OS
Mac OS X 10.11.4 or higher
Processor
Intel 2.4 GHz
RAM
8GB
Hard Disk
15GB
Graphics
1GB
Input
Gamepad

The following graphics cards are not supported: ATI X1xxx Series, ATI Radeon HD2xxx Series, Intel GMA Series, Intel HD3000, Intel HD5300, Nvidia 9xxx Series, Nvidia 7xxx Series, Nvidia 320M and Nvidia 8xxx Series. The following cards require you to have 8GB of System RAM: Intel HD4000.

This game is not currently supported on volumes formatted as Case-sensitive.

Linux

Minimum Requirements
OS
Ubuntu 16.04, Steam OS 2.0 (64bit)
Processor
Intel i3, AMD FX-6300 1.8 GHz
RAM
4GB
Hard Disk
16GB
Graphics
1GB AMD R9 270 or better, 1GB Nvidia 640 or better, 1.5GB Intel Iris Pro 6200 or better
Input
Keyboard & Mouse
Recommended Requirements
OS
Steam OS 2.0, Ubuntu 16.04 (64bit)
Processor
Intel i5 2.4 GHz
RAM
8GB
Hard Disk
16GB
Graphics
1GB Nvidia 7xx series or better
Input
Gamepad

NVIDIA GPUs require Driver version 367.27 (tested). AMD and Intel GPUs require MESA 11.2 (tested). AMD GPUs are not supported on SteamOS