This game contains elements from various types of games but the good point is the outcome that happens to be a cool online game. Humans are trying to make the lunar atmosphere suitable for human existence and so they have planted special plants which will start to yield oxygen only after it has grown strong enough. You are one of the humans on duty. However, the monsters who are the natives of moon sense the danger and they will attack you and look to destroy the plant when it is still small. You must protect the plant by using various weapons to attack the approaching enemies. The money collected in the process needs to be used to buy weapons and health units in shop.