Here is the full list of all 26 Obludia achievements.
Slay your first enemy.
Slay 20 chickens.
Slay 100 monsters with blade.
Eat 20 Hamburger.
Find 20 chest.
Buy your first dog.
Save 10 princess.
Throw 50 dynamites.
Slay 20 Devils.
Complete the game.
Complete World 1 – Dungeon of Doom
Complete World 2 – Ancient Tower
Complete World 3 – Frozen Island
Complete World 4 – Hell Gate
Complete World 5 – Space Ship
Die 50 times
Find the legendary golden monkey statue
Destroy 50 Alien eggs
Cast 50x Glacial Spike spell
Cast 50x Ring of Fire spell
Cast 50x Lightning Strike spell
Fire 100 Shotgun Shells
Slay 30 Ghosts.
Use 10x Holy Cross.
Find 1000 Coins.
Complete the game on HARD mode.