Black 4 Blood adds experimental support for both GNU/Linux systems and the Steam Deck portable console. However, this is not native support, rather the developer has done it using Proton (and with Easy Anti-Cheat). In any case, great news for fans of video games with a zombie theme and FPS (First Person Shooter) type, that is, first person shooters.
It must be emphasized that this is a experimental support at this time, so there could be small problems during its execution. It is not something final. Despite that, it works quite well, sometimes you receive certain disconnection messages, blinks, but nothing really serious. But if you take that away, it's pretty fun and rich in gameplay and fun.
PS: «We made an experimental change that we believe will make the game playable on Proton platforms like Steam Deck, SteamOS, and Linux. Although this not yet official support and has had limited testing, if you are a gamer interested in playing on these platforms you should no longer be prevented from doing so and should join us on our Discord to discuss bugs specific to this platform. "
For now, it is available both in the store of Valve, Steam, so you can buy and download it on your Steam client of your favorite distro, and it is also available on the Humble Store.
Great titles are coming for Linux, accelerated in part by the inertia that the Linux gaming world has taken, and helped by projects like Valve's Proton, and even by the very attraction of the Steam Deck console. And it seems that the ports made by Feral Interactive were not the best of the alternatives...
More information and download of Black 4 Blood – Steam site