Remember all the ruckus with various US states introducing operating-system level age verification laws? Colorado and California thankfully exempt open source.
HID Remapper is a useful open-source programmable adapter for USB input devices, with a recent release adding support for Valve's new Steam Controller.
The official Vulkan API Conformant Products list from The Khronos Group recently had Valve's Steam Machine appear on it - so a release is likely quite soon.
Bringing together the worlds of twin-stick arcade shooters with crafting and exploration, Veridian Expanse is another indie game with a demo worth a go.
As a bit of a PSA - you might want to ensure you're rather careful with Valve's new Steam Controller charging Puck. Keep anything conductive away from it.
Valve are (obviously) trying to get the New York lootbox lawsuit dismissed, with some interesting arguments to defend lootboxes in games like Counter-Strike 2.
Fracture Field is a new idle/incremental quarry mining game that will have you frantically clicking all over your screen to smash through every rock possible.
Love the idea of powering up yourself to the max while annihilating thousands of monsters? The first-person bullet heaven shooter Guns 'n Goblins is for you.