The The Mechanist Add-on for Chronicon has 7 achievements.
Reached level 100 as the Mechanist
Have 4 or more companions as the Mechanist
Have 10 or more Drones as the Mechanist
Have 5 or more Turrets active at the same time as the Mechanist
Obtain all the Anomalous Runes for the Mechanist
As the Mechanist, have fully socketed Legendary equipment in all equipment slots
Forged a Mythical Weapon on the Hellforge as the Mechanist