For those who like your old school action RPG games and you're interested in game engines, Flare hit the big full release recently along with the new Empyrean Campaign.
Long Gone Days seems like an interesting game, one that combines a character-driven RPG with a shooter and a visual novel, but sadly they have no ETA on the Linux version.
For those in need of a good RPG to play on Linux you're in luck, as Neverwinter Nights: Enhanced Edition is now officially available with day-1 Linux support.
The upcoming RPG sequel has been delayed a little bit to give the developers time to polish and improve the game following feedback in their closed beta.
Star Renegades is a brand new tactical rogue-lite RPG from developer Massive Damage, Inc. that are known for Halcyon 6, we have it confirmed it will support Linux.
Always on the lookout for something unique, Ganbare! Super Strikers ticks a few boxes for being really quite a unique idea. It mixes together a tactical RPG with Football.