Hyperspace Delivery Service, a very sweet looking pixel-art space trading and adventure game has officially released and comes with full Linux support.
From what I understand about it, it offers up what can basically be classed as multiple mini-games combined together. These include a really retro first-person shooter, space battles, simple puzzles and more. All that on top of basic trading, exploration, resources management and the list goes on.
A lot of people seem to say it's like a "sci-fi Oregon Trail", if that helps. It doesn't have a lot of reviews but from what little it has, players are impressed and enjoying it.