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