Here is the full list of all 53 Tiny Barbarian DX achievements.
Last 60 seconds against the horde
Try to stop an enemy by flexing!
You found a Secret Diamond!
Beat a gnome unconscious
Collect 200 coins in one life
Elbow drop a Vulture
Last 2 minutes against the horde
Beat Pitmaster in under 50 Seconds
Defeat Serpent Lord in under 90 seconds
Clear Episode 1
Clear Episode 1 without dying
Clear Episode 1 in under 35 minutes
Collect all the Secret Diamonds
But damnit, you got here!
Finish a stage without getting off the cat
Clear Episode 2
Clear Episode 2 without dying
Clear Episode 2 in under 50 minutes
Kill 12 Bees worth 25 points each in a single stage
Defeat the Ape 'King' in under 50 seconds
Kill six Guardian Bees in one level
Get 9 apes on screen at once, then kill them
Jump off the first cliff you can find
Collect all the Secret Diamonds (Ep 2)
Get through the big bee ride without dying
Hit with an angled Elbow drop
Collect all the Secret Diamonds (Ep 3)
Don't kill any dogs
Clear Episode 3
Clear Episode 3 without dying
Clear Episode 3 in under 45 minutes
Flatten a Zombie
Fall forever
Defeat the Cimmerian Boar within 50 seconds
Defeat the Blobcat within 45 seconds
Clear Bonus Episode
Clear Bonus Episode without dying
Clear Bonus Episode in under 9 minutes
Collect all the Secret Diamonds (Bonus Ep)
Knock someone off the caravan
Beat Axeman in under 35 Seconds
Defeat the Parrot boss within 75 seconds
Electrocute a Tiny Clone
Get launched by the Queen
Don't let the final boss eat anyone
Clear Episode 4