Proton Alternatives, Similar

Proton
All Proton Alternatives
ReactOS
ReactOS™ is an Open Source effort to develop a quality operating system that is compatible with applications and drivers written...
Wine
Wine is a free, open source application for running Windows software on operating systems that are normally not supported. With...
PlayOnLinux
PlayOnLinux (PlayOnMac at http://www.playonmac.com ) is a tool to help Linux (and Mac) users run games and programs for Windows...
Parallels Desktop
Parallels Desktop gives Mac users the ability to run Windows, Linux or any other operating system and their critical applications...
VMware Fusion
Seamlessly run your favorite Windows applications and devices, on any Intel-based Mac. Built from the ground up for the Mac,...
CrossOver
Windows compatibility on Mac, Linux, and Chrome OS with no Windows license. CrossOver allows you to install many popular Windows...
Proton About
Proton is a tool for use with the Steam client which allows games which are exclusive to Windows to run on Linux kernel and macOS operating systems. It uses Wine to facilitate this.Most users will prefer to use Proton provided by the Steam client itself. The source code is provided to enable advanced users the ability to alter Proton. For example, some users may wish to use a different version of Wine with a particular title. More Info »Getting Started with Proton from Steam Play
Make sure you are opted into the Steam Client Beta!
Proton requires graphics drivers that are more recent than what is typically packaged in most distributions; please read the list of requirements and quickstart for Ubuntu 18.04 users: https://github.com/ValveSoftware/Proton/blob/proton_3.7/PREREQS.md
Install and play games! Please refer to this post for more information: https://steamcommunity.com/games/221410/announcements/detail/1696055855739350561