-Game Features-
* 12 types of weapon platforms, 19 upgrades, and more than 100 upgrades
*Accumulate diamonds through the game, gradually unlock 36 kinds of store items
*15 levels, hundreds of enemies swarm over
*Manual click to fire sky cannon
*It can also be used with 11 kinds of automatic weapon platforms to place and shoot
*No in-app purchases
Chronicle
-In 2037, human archeology discovered an ancient mysterious base hidden deep under the ocean.
-In 2040, Scientists successfully activated the mysterious base.
-In 2041, with the assistance of base intelligence, human beings unlocked ancient technologies and "artifacts" one by one.
-In 2043, after deciphering the function of the artifact, enemies within a certain range outside the planet cannot use the weapon system.
-In 2044, the function of deciphering the artifact was restarted, and a mysterious fleet emerged outside the solar system in the same year.