In this guide, we will walk you through every single hidden room, breakable wall, and disguised alcove across the game’s 15+ levels. Warning: Minor spoilers ahead, but your survival is worth it.

Finding all the hidden caches in is essential for surviving the higher difficulty settings, as they provide the extra cash, ammo, and high-tier weapons needed to clear out the massive hordes. While some are hidden behind breakable walls, others require careful exploration of the map's edges. Mission 1: The Outskirts