We've seen classic point and click adventures but what about merging one with a beat 'em up? Punch & Click appears to be what you get with BROK the InvestiGator.
Mighty Fight Federation is a multiplayer arena fighter with a focus on "fighting game fundamentals" that recently launched officially for Windows in Early Access but Linux is in their plans.
Never missing an opportunity to run a big sale, Valve have put together a big fighting game sale including multiple genres with lots of games going cheap.
Lizardcube and Dotemu announced today that Streets of Rage 4 is now officially supported on Linux (and macOS), with a port done by Ethan Lee creator of FNA.
Shing! from developer Mass Creation is what they're calling a "beat 'em up 2.0", as it does away with button-bashing and replaces it with a new weapon control system.
Streets of Rage 4 is a classic beat 'em up series revived thanks to Dotemu, Guard Crush Games and Lizardcube that releases today. It's also going to be playable on Linux.
One we completely missed from Gamescom is Shing!, a new beat 'em up from developer Mass Creation releasing next year and it looks like it's going to be a lot of fun.
MADNESS: Project Nexus popped up on Steam recently and this mix of a running, gunning and beat 'em up is planning to support Linux when it releases later this year.
While 9 Monkeys of Shaolin did have a pretty big delay, Sobaka Studio have just recently announced a new release date (including Linux support) along with help from Koch Media.
Another bit of positive crowdfunding news for you today, as Tunche, the 2D beat 'em up with procedurally generated worlds has been funded and so it's coming to Linux.
Coffee Crisis from developer Mega Cat Studios was originally released for the Sega Genesis/Mega Drive and now it's updated and out on PC with Linux support.