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... A copy of Sub Terra is required to make use of this expansion.