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