Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Brain Bait	Startup the game and...
Critter Combo	Defeat 4 enemies in a row in Arcade Mode.
Defender of the Cosmos	Score 5,000 points.
Galactic Gem Master	Score 1,500 points with the Gem.
Honor the inventor	Score 1,000 points in MZ-80 Mode.
Monster Madness!	Reached CAUTION Mode.