With a focus on flashy kicking, punching and beating, Sirocco Thugs could be one to watch if you love boomer shooters but fancy smacking people with a lead pipe or knuckledusters instead while you do combos. There's a demo available on Steam right now and it works on Linux with Proton.
I especially like that the developer is called BRIAN DAMAGE — heh.
The developer says it takes place "in an authentic Southern Italian setting, the game puts you in the shoes of one man - Tugg DiMamma - embarking on a quest for revenge". You'll brawl your way through various hordes of thugs, and eventually come face-to-face with "the Don".
Direct Link
From the Steam page:
Article taken from GamingOnLinux.com.ALL MASHED OUT!
Collect melee weapons such as Lead pipes, Shovels, Rusty chains and Reinforcing Bars from your environment - or fallen enemies - to explore the facets of Thug Style combat, portrayed with snappy animations based on over-the-top street fighting moves and advanced Martial Arts!
Employ a mix of vicious body-flinging kicks, gravity defying acrobatics and lightning-fast truckloads of blunt force trauma to beat (literally!) the overwhelming odds set before you.
When all else fails, bring a gun to a fist fight and re-balance the playing field with headshots, shotgun blasts and contraband machine guns!
COMBO OR DIE BRAWLING!
Evade incoming attacks and chain together your moves to build up your Combo Multiplier, allowing you to reap rewards such as health restoration, score bonuses and super attacks !
Master the battlefield and set new score records to unlock Extra content - including secret levels and game-mutating cheat codes !
You can also find comments for this article on social media: 
Patreon
PayPal
How to install, update and see what graphics driver you have on Linux and SteamOS
How to set, change and reset your SteamOS / Steam Deck desktop sudo password
See more from me