Here is the full list of all 94 Shop Titans achievements.
Spend a lot of uncommon resources
Increase your merchant level
Clear many quests
Craft many items
Spend a lot of common resources
Help fellow guild members
Master many blueprints
Sell a ton of items
Bring back lots of components from quests
Deal massive damage with a single attack
Upgrade a furniture to a high level
Have a Hero reach a high level
Earn lots of gold!
Slay many bosses
Hire many workers
Open many chests
Make a lot of gold from a single sale
Hire many champions
Spend a lot of energy
Research lots of blueprints
Enchant an item with both a spirit and an element
Fully ascend several items
Expand your shop
Earn tokens at the Fortune Zone
Spend a lot of rare resources
Enchant many items
Enchant a legendary item
Unlock all item types
Reach Argon's final rank
Reach Sia's final rank
Reach Yami's final rank
Reach Lilu’s final rank
Reach Rudo’s final rank