Here is the full list of all 10 Galactic Missile Defense achievements.
Use your Plasma to upgrade any booster.
Upgrade all boosters and weapons to maximum level. A task only for the mighty!
Destroy a total of 500 enemies, using the Black Hole booster.
Destroy 1 of each enemy type.
Destroy a total of 100 Vault Keepers.
Use 1 of each booster and weapon type.
Destroy a total of 250 enemies, using the Armageddon booster.
Clear level 25.
Destroy a total of 200 enemies using the Lightning Gun.
Play a round, having 6 max stacked boosters from the start of the game.