If the 1990s Fallout games were action-based and done using Sega Genesis/Mega Drive graphics, you'd have Death Trash. Open world? Check. Post-apocalyptic setting? Check. Gritty, grounded art style? Check. Dark humor? Big ol' check! Optional side quests? Another big ol' check! Multiple endings - including those in side quests - based on player decisions? Yet another big ol' check! Toss in local co-op play, which Fallout lacked, and support for Linux and Mac and Death Trash has alotta bang for not much buck. Played on Windows 10 and Linux Mint 21.1, with an Xbox One controller, on a laptop with an AMD Ryzen 5 3500U APU laptop, on a desktop with an RX 6600, and a desktop with a GTX 1050 Ti. Ran fantastic across the board.
Take Mega Man, Bionic Commando, and a bit of Streets of Rage, put'em in a blender and puree. The stage selection and abilities unlocked through defeating bosses from Mega Man. The use of a grappler from Bionic Commando. The differing melee attacks from Streets of Rage. And these features blend effortlessly in Gravity Circuit. Upon completion, which is a bit short, there's New Game+ mode. There's also a Challenge Mode. I'd knock off a star for being short, but New Game+ saves it. Played on Linux Mint 21.1 (vera) with an old Logitech F310 and GT 730 graphics nice and smooth.
Gen Xers should remember Gaunlet. Now, take Gauntlet's top down action and simple mazelike stages, give it a cyberpunk setting, neon polyganal graphics, and randomize the stages and weapon loadouts. Wahlah! You get Neon Chrome. With each death (and you'll die often) you start with a new character awakening from a cryotube while keeping your upgrades, grab a random weapon, and restart the floors. Weapon functions, environmental obstacles, environmental cover, varying enemy attacks, and hidden weapons and upgrades are peppered in and randomized. Very modest hardware requirements with Windows, Linux, and Mac support make Neon Chrome very accessible. Played on Windows 10, Linux Mint 17, and Linux Mint 21, with an AMD Ryzen 5 3200U (laptop) and varying Nvidia and AMD GPUs (desktop). Ran great across the board.
