Here is the full list of all 28 DUNGEON: Cradle of hell achievements.
Kill the first enemy
Get trained
Pass level 1
Pass level 2
Pass level 3
Pass level 4
Pass level 5
Pass level 6
Kill Red-haired Bun
Kill the guard
Find a cemetery
Beat the game
Kill an enemy with magic
Kill the main boss
Kill everyone on the floor
Receive a blessing at the cemetery
Get cursed in the cemetery
Fall into a trap
Rise from the dust for money
Kill an enemy with Olga's Wrath
Find a rare sword in the chest
Upgrade "hero’s accuracy"
Upgrade your “heroic strength”
Upgrade "surprise m#@&r"
Make a purchase in the store
Make a sale in a store
Escape from the battlefield
Free the gnome from prison