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