You’ve returned to the cave, and you’re not alone. A new threat has emerged from the shadows - faster, deadlier, and hunting you down... Extraction adds more horrors to the cave with the new fast-moving Leaper hazard card. Fight them off with the Mercenary, a flexible blend of cautious explorer and powerful defender. Above all else, you must carry proof of the infestation back to the surface, or die trying...The base game is required to play this expansion.