Powerful Action Shooting Games! Defend the Moon Monster! Google Cloud Save, Leaderboards, Achievements. 2039 year Korea Space FAA Space-K Moon base is constructed. First 50 astronauts resident. After a two years, Increased to 100 astronauts. One day, their disappearance was caused astronauts. Korea Space FAA sends commandos seal. Android OS 3. 0 or later.