The Expeditions Corruption Mechanics expansion adds elements of risk and danger in the form of secret bonuses on map tokens and a corrupted mech that roams the land.

To counter these threats, the expansion introduces 2 new mechs and 4 new character/companion pairs, as well as components for a 6th player.

Corruption Mechanics also speeds up the early game by giving players starting resources and a worker hero that can act as any type of worker.