Galaxy in Turmoil is an upcoming shooter that looks promising, with large 32v32 battles that take place both on the ground and in the air. The developers are looking to do a Linux version too.
DXVK, which provides a Vulkan-based D3D11 and D3D10 implementation for use in Wine has a new build out. The pace of development on this continues to absolutely mesmerise me.
The amazingly useful SC Controller project, a third-party open source driver and user interface for the Steam Controller has a new release out. Sadly, the last for a while.
Writing an update on what's happening with Ashes of the Singularity: Escalation, the Stardock CEO mentioned Linux support again in a recent post on Steam.
For those who like to use their PC to emulate other platforms, the Citra emulator for the Nintendo 3DS just put out a progress report and it's very promising.
It seems Transhuman Design have removed the Linux version of BUTCHER after users reported issues, opting instead to ask Steam to add it as an approved Steam Play title. UPDATED.
Mavericks is an incredibly promising sounding shooter with an interesting take on the Battle Royale-type games although it's having a delay in the release.
Din's Legacy, the latest action-RPG from Soldak Entertainment has entered Early Access on Steam and early reports suggest it could be good when further developed.