Here is the full list of all 30 Let's! Revolution! achievements.
Recieve a complimentary Bubbleship Ticket from Chovy.
Hide 4 enemies with a Smokebomb.
Hit an enemy for 5 damage.
Complete a run without taking any damage on Normal or harder.
Finish a run on normal or harder in under 10 minutes.
Maintain your Charge for 15 turns.
Perform a Slash for 0 Energy.
Hold 100 gold.
Defeat the King on NG+5.
Hit 6 enemies with Armageddon.
Defeat the King without stepping on any enemies.
Unlock all skills and items.
Defeat the King with the Witch.
Defeat the King with the Hunter.
Defeat the King with the Charger.
Defeat the King with one health remaining.
Hit 4 enemies with Roundhouse.
Defeat the King with the Oracle.
Catch the King without killing any enemies.
Perform Premonition for 0 Energy.
Escape a level with 5 or more visible enemies.
Defeat three or more enemies in one turn.
Defeat the King with the Shadow.
Max out your Energy.
Defeat the King with the Trooper.
Defeat the King.
Max out your Health.
Reach Beebom City.
Defeat a Heavy Guard.
Complete the tutorial.