Here is the full list of all 28 Gorytale achievements.
Find D secret.
Make a basket.
Find fish secret.
Complete the hell story.
Shoot the rifle magazine without hitting any enemies.
Upgrade all the weapons to the max.
Complete the tutorial in annoying mode.
Avoid being damaged in arena for two minutes.
Kill 10000 creeps.
Fill your purse with 1000 coins.
Fall off the game map.
Complete first story level shotgun altar arena using only your bare hands as a weapon.
Survive any arena mode for more than 5 minutes.
Kill flying ice cream monster using the Toaster.
Get owned by a banana.
Shoot a cannon ball through a doughnut's hole.
Find the CHOPPA secret.
Kill Diarrhio when its about to fart.
Kill yourself with the Doot.
Kill a Chilli Bomber with bare hands.
Kill 10 creeps with single cannonball.
Complete the story two.
Destroy Candy Mountain’s cherry projectile.
Kill 1000 creeps.
Flip off while not in tutorial.
Enter free candy van
Complete the story one.
Kill 500 creeps.