Here is the full list of all 29 Rayon Riddles - there are Rise of the Goblin King achievements.
Complete Level 1
Complete Level 2
Complete Level 3
Complete Level 4
Complete Level 5
Complete Level 6
Complete Level 7
Complete Level 8
Complete Level 9
Honor Thy Ancestors
Find all blueprints
Cook A Yummy Meal
Play a calm tune
Play some catchy free jazz tunes
Don't fish for the fish, fish for yourself
Come in like a wrecking ball
Two unstoppable forces
Create a new species
Live, die, resurrect, repeat
Don't get killed
Watch your step
Get killed, get killed and then get killed again
Add some gold to the treasure
Try the resurrection spell
Die several times and repeat
Find the sacred sword
Bring the furnace the resource it deseres and not what it needs
Pour A Drink For Champs
This One Is Classy