Hello! I am a newer Linux user, and I've been running games through steam with no issue until recently. When I first started my computer on Linux Mint (Cinnamon), I had no issues playing any games through steam. Some games needed Proton Tricks but beyond that, everything was good. But within the past few months, I have had games randomly crash with various levels of severity. The game runs fine for anywhere from 1-4 hours, and then will freeze completely. Sometimes I can exit the game, close it through System Monitor, and then restart it through Steam. Sometimes, it completely freezes my computer to the point where I have to manually hold down the power button to restart it. There are rarely ever any crash logs or even any indication from the game, Linux, or Steam that a crash even occurred.
At first I thought it might be that I didn't have enough ram. I bought another 16gb of ram and installed it, as well as thoroughly cleaned my computer. Unfortunately, none of that helped. I've reinstalled steam, checked updates, and checked and verified all game files. The only thing I haven't done is to reinstall mint entirely. I kind of doubt it's a temperature thing, because restarting the game/computer works well and the game sometimes won't crash for up to an hour after.
Games that have crashed: FFXIV, Deep Rock Galactic, Ship Graveyard 2, Grounded 2, Minecraft (modded), and Powerwash Simulator 2.