Lots of engineering.
Fully working computer system.
Space battles against the AI or other players.
Abandoned ships full of loot.
Duct tape!
Seamlessly landing on planets.
Advanced economy system.
Random encounters.
Mining, trading, and looting.
Single and multi player connected via the multiverse.
hmmm, troszkę widać chyba ukradzionego wręcz od EWY