The Marker Containment mission is available in Chapter 14, after Isaac Clarke and John Carver reaches an elevator en route to the Rosetta assembly station. Carver suddenly sees a toy soldier in front of the elevator, before hallucinating a bloody vision of his wife (is actually Clarke in reality). He then requests Clarke to investigate the warehouse below, while trying to put an end to the visions. Throughout the mission, Carver is occasionally overwhelmed by his Dementia, leaving him defenseless and Isaac has to defend him from onslaughts of Necromorphs until he recovers, for a total of three times (two if the mission has previously been completed). Once the final hallucination sequence is over, the two exits the warehouse, agreeing that what happened should never be talked about again.