Wonder Defense: Chapter Earth, offers new ways to interact with your world, expand your military power across the Earth. Fight against unknown alien power to search new living areas in Mars, if you survive. Features Try to survive against Aliens of unknown origin. Upgrade 57 Perks to survive. Harvest rare minerals and help your engineers to repair wonders. Fight the enemy with the military units you have. Watch out for natural disasters. Complete Missions to earn money. Use nuclear weapons to destroy the enemy. Place your units to protect Wonders.