In Starship Rubicon, Earth has been casually destroyed by a mysterious race of space-faring invertebrates. You are a fighter pilot whose cryopod has been collected by a possibly-insane AI, who has placed you in the unenviable position of being humanity's savior. Shanghaied and alone, you must gather the remaining human survivors and traverse the surprising biodiversity of deep space to find a new home.
...know what? Instead of copy+pasting the rest of the description from the Steam page, let me instead direct you to this wonderful writeup + breakdown of the systems in the game over at Neogaf.