That is really frustrating. What a bunch of incompetent soydevs! They should upgrade their crappy software, not you your drivers: you are almost certainly more up to date than anyone playing that game on buntu.
To figure out what happened, you first need a list of all the packages that were upgraded on Sunday. You can find that out by looking at /var/log/pacman.log, near the end…
Since Sunday was 31st October, a command like this will give you all the entries relevant for that date:
grep "^\[2021-10-31" /var/log/pacman.log
Share the output here.