PULSAR: Lost Colony is a space exploration game where you and friends (or AI) can team up to play a unique role on board a spaceship. It just had a pretty huge update!
SAELIG is a hard game to properly describe, with it pulling in elements from many games. It has features found in simulation and building games as well as RPGs, it's also now on Linux.
Depth of Extinction is a retro-inspired turn-based tactics game, it's a little like XCOM with some rogue-lite features thrown in and it's getting better all the time.
It seems when covering the latest Factorio update we missed two rather important things: The price is going to increase and it's leaving Early Access soon.
Project 5: Sightseer was love when I first tried it and it continued to be love until you realised how empty it was. The developer is finally making steps to solve this with some PvE content.