Here is the full list of all 29 ESCHATOS achievements.
Reach option level 50.
Color all 10 planes in the epilogue.
Reach loop 4 in ENDLESS MODE.
Clear ADVANCED HARDEST Mode.
Clear ORIGINAL HARDEST Mode.
Survive over 30s with 0 shield.
Clear ADVANCED HARD Mode.
Clear ORIGINAL HARD Mode.
Watch the replay of another player.
Reach a x20 score multiplier.
Clear TIME ATTACK Mode.
Play all modes and difficulties.
Reach option level 25.
Clear ADVANCED NORMAL Mode.
Clear ORIGINAL NORMAL Mode.
Beat the mysterious organism that had merged with the moon and escape. (Normal difficulty or higher)
Hold out until the mirror shield autodestructs.
Clear ORIGINAL EASY Mode.
Defeat the Kraken in Area 24 before it is killed by enemy laser.
Reach option level 10.
Clear ADVANCED EASY Mode.
Destroy the 3 eggs on the carrier in Area 14.
Fight off the giant mothership in Area 20 and plunge towards the moon. (Normal difficulty or higher)
Fight off the transport ship in orbit. (Normal difficulty or higher)
Follow the transport ship into orbit. (Normal difficulty or higher)
Upload a score to the global leaderboard.
Confront the giant mothership in Area 5. (Normal difficulty or higher)
Destroy over 512 enemy bullets with one shield activation.
Finish off the final boss at point-blank range.