Terraforming Mars: Prelude 2, the sixth expansion for Terraforming Mars, focuses on cross-expansion effects, prelude cards with ongoing effects and actions, and more project cards for your tableau...not to mention five new corporations.

Most of the cards are specifically connected to other expansions of Terraforming Mars (Venus, Colonies, Turmoil), but the 5 Corporations and 13 of the Prelude cards are playable without any of these other expansions.

"As the mega-corporations are getting ready to start the terraforming process, you now have the chance to make those early choices that will come to define your corporation and set the course for the future history of Mars - this is the prelude to your greatest endeavours! This expansion for Terraforming Mars lets players choose from Prelude cards that jump-start the game by building the backstory of their corporation and shaping their strategy."