-Hard science fiction. Update: GAH, NO! I'm focusing on fun gameplay instead. I still want to get corrected on glaring scientific errors, though. -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.