ProtonDB is a website that allows users to rate the compatibility and performance of Steam games when played on the Linux operating system using a tool called Proton, which is developed by Valve Corporation. Proton is a compatibility layer that allows Linux users to play games that are designed for Windows on their Linux systems.
ProtonDB allows users to rate and review the games they have tested with Proton, and provides information about the specific version of Proton that was used, any issues that were encountered, and any workaround solutions that were found. This information can be helpful for other Linux users who are interested in playing a particular game on their system and want to know if it is likely to work well with Proton.
Overall, ProtonDB is a valuable resource for Linux gamers who want to find out more about the compatibility and performance of different games on their system. It can help users to make informed decisions about which games to purchase and play on their Linux systems.