Occurring either immediately after Erebos or after the Nydus Worms Mission depending on the difficulty, the second Hold Out is much tougher than the first, and is very hard to Tank, especially on higher difficulties. It will contain virtually every type of zombie, although bigger foes like Devourers, Slashers, and high concentrations of Agrons are only in harder difficulties. On Recruit, difficulty players usually choose the high ground left of the Airlock's right entrance. On Normal or Nightmare, players try to hold out at the Fort, as it's tall walls will prevent Slashers and Devourers from cliff climbing. Regardless of the difficulty the hold out always ends with a large Gargoyle wave. This is best dealt with using either Sonic Traps, Taunt, or Escape. After this mission marks the start of Chapter 2.