The Big Expansion includes a number of mix-and-match components:
Pieces and rules for five-player games.
An updated version of Rough Road Ahead, a set of cards previously released in a downloadable format on the Czech Games website that will be expanded and reformatted.
Additional adventure cards, including two previously available only at Spiel 07.
A special deck of adventure cards that players individually insert into the deck themselves to surprise their fellow drivers.
A new alien species, each of which comes with a unique special power chosen by the alien tender (i.e. you) after selecting the critter.
New ship building components, including life support for the new ET, stasis chambers for hibernating astronauts, cannon engines, battery holds, and more.
New ship classes.