Purple Anomaly Island — Co-Op Survival

A transport plane loses control and a squadron falls scattered on an unknown island. Without a signal or rescue, the survivors build a military base with recovered remains. Strange minerals generate anomalies and open unstable portals where zombies appear. Cooperate, unlock weapons, upgrade defenses, and explore dangerous areas. Special enemies and unpredictable events change the battle. It resists 100 waves and ensures final extraction before the island collapses.