Earthlock: Festival of Magic gained a Linux Alpha version last year, but they went pretty quiet about it for a while. They have now confirmed they will continue the Linux version once the WiiU version is finished.
The Exiled, a new discovery recently that aims to combine the open-world approach of an MMO together with MOBA style battles. The icing here is that it supports Linux.
It has been nearly 7 months since the last release of the rather good looking open source RTS 0 A.D. and they only have 8 tickets left open to finish, 4 of which are patches with code basically ready.
The developers of 'Earthlock: Festival of Magic' have delivered a Linux alpha of their 3D RPG, you need to request access for now until it's more ready.
The super cool theme park builder Parkitect has reached alpha 5, it seems like a smaller release overall as it's laying the foundation for future updates.
Guts and Glory is basically the 3D version of the Flash game Happy Wheels and this is even acknowledged by its author, a single developer who started the project on his own during his spare time.
Wine Staging 1.9.11 has been released this weekend. This release is a small update containing only a few improvements targeting different applications.