Here is the full list of all 36 TinyKeep achievements.
Complete the game without directly killing any enemies
Incur the wrath of Maggie
Master the ability to bend time
Unlock the Final Weapon
Leave Maggie behind in the dungeon
Complete the game in New Game+ mode
Release the horde
Sacrifice gold to the gods
Give your friend and ally what was coming to her
Complete the game without being hurt at all
Complete the game without using a shrine once
Discover the Flaming Sword
Access the developer's office
Complete the game without eating a single piece of food
Complete the game without a shield
Witness a Dungeon Party
Find a use for that damn acid cauldron
Resurrect from the dead
Discover the secret shop entrance
Befriend a Baby Dragon
Reach the Alternate Demonsion
Grace the dungeon with an air of elegance and sophistication
Disregard the principles of permadeath
Beat Level 5
Ascend to the overgrown surface
Discover a treasure chest
Sacrifice gold to the higher gods
Destroy your first crystal
Deflect a magical projectile
Defeat the first boss
Discover the hidden stash of gold
Kill your first hostile
Release your first prisoner
Die the first time
Find a Shield
Find a Sword