Your helicopter has crashed landed! Fight off the zombies until you're rescued! 21 waves of zombies, can you make it out alive❓ 💥 👽 21 Day Challenge ! 👽 4 Player Co-op ✅ Duo, Trio , Solo ✅ Survival Game mode ✅ Quests ✅ Map Updates ✅ UPDATED ON 09-08-2024