Prodeus is a crowdfunded retro-inspired first-person shooter currently in Early Access and it's set to get a huge upgrade soon with online co-op support.
Not heard of it before? The developers describe it as a "first person shooter of old, re-imagined using modern rendering techniques. It reaches the quality you expect from a AAA experience while adhering to some of the aesthetic technical limits of older hardware".
With a big update coming soon it will add in online co-op and there's going to be an array of new campaign maps to blast through, new music from Andrew Hulshult and a bunch of new community maps too. Their new trailer was shown off during Realms Deep 2021 which you can view below:
It doesn't have a native Linux build yet, which it did have confirmed as a release platform on the original Kickstarter campaign. We spoke to the developer recently to ask if there was an update on that coming but they simply told us there was "no eta" on it. For now you can run it unsupported using Proton where it works quite well.