Ensure you have at least 2GB of available space and a controller (highly recommended for the best experience).
If you purchased a DRM-free version previously, log into your account library to grab the latest installer. Quick Setup Guide
The primary hub for the game. If you already own it, your library should automatically queue Build 7603151. If not, simply search the store to purchase and download.
Always avoid third-party "crack" sites or unofficial mirrors. These often bundle malware with the game files and won't support the indie developers at Studio Evil .
Run the installer or let the client handle the heavy lifting.