Serious Sam: Siberian Mayhem is out now as a partnership between Timelock Studio and Croteam. It can run rather well on Linux, although you do need a quick adjustment for Steam Play Proton.
Read the full article here: https://www.gamingonlinux.com/2022/01/serious-sam-siberian-mayhem-is-out-run-it-on-linux-with-one-small-change