Sleep Outbreak is an online co-op multiplayer game for 4-8 players about entering The Sleep and surviving to save Moribos and extract loot. Difficulty increase and chance of rare Moribos and valuable loot as you survive more days in The Sleep. Day and night cycle, Dynamic weather. Moribos appear at different times in different environments. Monsters become stronger as night falls upon the region. Moribos that are saved can be your ally for subsequent runs. Map selection: downtown, Forest, Mall. Proximity chat - communicate with your friends. Use stealth and items to avoid hostile monsters.