Here is the full list of all 22 Galacide achievements.
Travel a total distance of 500,000 parsecs.
Clear 25,000 Bits.
Clear puzzle mode
Get 1 million points in Endless Play
Get to threat level 10 in Endless Play
Kill 10,000 Enemies.
Beat level 6. Unlocks the military ship.
Get 500,000 points in Endless Play
Complete 10 multi-matches
Store 3 bombs in the freighter's cargo.
Kill 3 enemies in one phase ship charge shot.
Beat the boss and get to threat level 6 in Endless Play. Unlocks the Phase ship.
Destroy 3 enemies in a bomb's explosion
Beat the snake boss on any difficulty
Get 750 bit clears in a level
Reach a combo of 25
Complete a Multi-match
Get 500 kills in a level
Beat Level 1. Unlocks the Freighter ship.
Get a clear of 10 or more, 10 times.
Reach a combo of 15
Get a combo of 5