Here is the full list of all 37 Songbringer achievements.
Finish the fifth dungeon.
Perform 50 charge attacks.
Finish the third dungeon.
Meditate or use a cactus to find a secret.
Buy an item from a store.
Finish the first dungeon.
Open a secret wall.
Kill four or more enemies at once.
Enter any dungeon.
Wield the nanosword.
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.
Walk a secret path.
Speak friend and enter.
Combine two items at the Droidsmith.
Clear an easy dungeon of all enemies.
Clear a difficult dungeon of all enemies.
Complete the game without buying any items.
Finish the second dungeon.
Finish the fourth dungeon.
Finish the sixth dungeon.
Finish the seventh dungeon.
Finish the eighth dungeon.
Finish the ninth dungeon.
Play the game at 11:11 AM or PM
Complete the Trial of Ren.
Gain the power to meditate during battle.
Craft the Hyper Boots.
Craft the Flamethrower.