Here is the full list of all 24 Aeon of Sands - there are The Trail achievements.
Loved Lindsay back without restrain
Got Agrime to join your party
Reached the marketplace
Found rebreather mask
Saved Pantella
Destroyed Pantella
Saved your skin
Had a wacky nap and dream in game
Max score in Neons of Kand
Obtained the rusty bucket helmet
Traded the bucket to Calca
Traded the carcass to Calca
Kill Harro.
Harro has left you in disgust
Harro has left you in horror
Backstabbed Harro for a girl
Sacrificed Harro to the God Below
Left Harro with the Rogues
Managed to get disrobed in the valley
Flirted with Courtney
Found the exit from the caverns
Killed Nematazi
Killed the Ant Queen
Killed the Sandcrawler God