Here is the full list of all 37 Songbringer achievements.
Finish the third dungeon.
Speak friend and enter.
Clear an easy dungeon of all enemies.
Open a secret wall.
Play the game at 11:11 AM or PM
Perform 50 charge attacks.
Wield the nanosword.
Finish the first dungeon.
Finish the second dungeon.
Walk a secret path.
Meditate or use a cactus to find a secret.
Kill four or more enemies at once.
Enter any dungeon.
Buy an item from a store.
Complete the game with any percentage of items.
Complete the game with 100 percent items.
Complete the game with 100 percent map.
Complete the game in permadeath mode.
Complete the game in under 2.5 hours.
Complete the game without the sword.
Interact with every NPC.
Kill every kind of enemy at least once.
Have less than 1 courage after vanquishing a boss.
Unlock all achievements.
Combine two items at the Droidsmith.
Clear a difficult dungeon of all enemies.
Complete the game without buying any items.
Finish the fourth dungeon.
Finish the fifth dungeon.
Finish the sixth dungeon.
Finish the seventh dungeon.
Finish the eighth dungeon.
Finish the ninth dungeon.
Complete the Trial of Ren.
Gain the power to meditate during battle.
Craft the Hyper Boots.
Craft the Flamethrower.