Do you like the sound of trading, space combat, retro FPS combat, resource management and more? Hyperspace Delivery Service [Official Site] has all of that.
According to the game description, you were hired by the Hyperspace Delivery Service to make a perilous journey across known space for a special delivery. During your travels, you will need to manage your fuel, oxygen, food, and various other supplies. On top of that, you will be dealing with pirates with 3D space combat, fight on the ground with retro-inspired FPS combat and much more.
Coming sometime in "Early 2019" according to the Steam page, the developer confirmed to me personally that it will support Linux too.
Take a look at the new teaser trailer: