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