Here is the full list of all 33 Ninjin: Clash of Carrots achievements.
Collect all swords.
Collect all artifacts.
Collect all projectile items.
Collect all accessories.
Spend 1000 rainbow carrots at the shop.
Collect 10 accessories.
Play a stage in co-op mode.
Beat a stage without dashing.
Beat a stage without using swords.
Spend 20000 carrots at the shop.
Get an S-rank medal in every stage.
Defeat the final boss Sum-Moe-Ner and clear the game.
Venture into the Summoner's dark world.
Cheat in Moe Jr.'s challenge in stage 4-4.
Defeat the Summoner in World 3.
Reach wave 50 in the Oni TV Show.
Collect 15 projectile items.
Collect 30 swords.
Collect 10 artifacts.
Defeat 3000 enemies.
Reach a combo of 500.
Clear wave 6 in stage 1-4 without taking damage.
Beat a stage without using projectiles.
Defeat the Ice Troll in World 2.
Beat stages using a sword of every class.
Reach a combo of 100.
Defeat General Jam in World 1.
Play in the Oni TV Show.
Get an S-rank medal in a stage.
Clear stage 1-1.
Defeat 100 enemies.
Equip an accessory.
Make Corgi Jr. dizzy in the shop.