Here is the full list of all 22 Dream Cycle achievements.
Complete the first adventure
Recast an adventure
Die and respawn at the Cavern of Flames
Free 30 trapped souls
Critically Hit enemies 500 times
Learn 8 Spells
Find 25 hidden chests
Discover 5 maps
Completed 4 story books
Kill 20 enemies with telekinesis
Finish an adventure without using Astral Projection
Finish an adventure without taking any damage
Buy items for 10,000 gold
Finish 1 anomaly story
Finish 3 anomaly stories
Finish 1 level under the par time
Finish 5 levels under the par time
Finish 1 level without being detected
Finish 5 levels without being detected
Leave Erin behind in the Dreamlands
Save Erin and escape the Dreamlands together
Stay behind in the Dreamlands