Hellas & Elysium is the first expansion for Terraforming Mars. This set includes a double-sided game board that serves as an alternative to the base game, allowing players to attempt terraforming in different locations on the red planet. Elysium features a vast and flat northern region, while the south is dry and rich in minerals. Hellas, on the other hand, is the southern part of the planet known for its seven massive craters that develop into a lake. Each board has its own objectives that must be achieved, significantly increasing the variability of the game.