Here is the full list of all 62 Merchant achievements.
Sell something. Anything. Try it out, it's really easy and rewarding.
Craft a potion. Use potions to avoid dying. Not dying is an optimal strategy.
Craft a piece of armor. Try equipping it. Or don't. I'm not going to tell you how to live your life.
Craft a weapon. Helpful for defeating enemies.
Defeat Maexna, boss of the first Region.
Defeat Basamus, the Boss of Yarsol Cove.
Defeat Ares, the Boss of Aldur Highlands.
Defeat the Lich King, the Boss of Vulkrum Badlands.
Good luck.
Find and defeat your first rare enemy.
Hire 3 heroes to send on quests.
Hire 5 heroes to send on quests.
You've hired a full stable!
Unlock the Berserker Hero Class.
He's not the hero we need, but the one we deserve.
Sell 100 items. It makes you money. Give it a try.
Sell 1000 items. Wow that's a lot of items.
Sell an item for more than 500 gold.
Sell an item for more than 1,000 gold.
Sell an item for more than 2,000 gold.
Sell an Epic item. I know it can be hard to part with.
Sell a Legendary item. Really? You finally got a Legendary and now you're going to sell it?
That's a lot of potions.
5000? Really? You're heroes are probably pretty tired of getting beat up.
Making an army!
Legendary Weaponsmith!
Gotta keep safe!
The Grand Protector!
Create an item with a prefix or suffix bonus.
Craft an item with a +4 Suffix.
Reach Hero level 10. You're on your way traveler.
Reach Hero level 20. Quite the adventurer you've become.
Reach Hero level 30. A mighty warrior you have shaped up to be.
Reach Hero level 40. A legend is born.
Reach Hero level 50. A god emerges.
Prestige a Hero.
Unlock 8 additional inventory slots.
Unlock 32 additional inventory slots.
Unlock 64 additional inventory slots.
Over 10,000 Gold earned. You should go out an celebrate.
Over 50,000 Gold earned. You'll be famous in no time at this rate.
Over 100,000 Gold earned. You've made it.
Deal 10k total damage with a single Hero. That's a lot of damage.
Deal 50k total damage with a single Hero. Someone needs to stop this guy. It's getting out of control.
Deal 100k total damage with a single Hero. This Hero may be a borderline sociopath. Someone should keep an eye on this guy.
Finish 100 Quests. Quite the accomplishment.
1000 Quests? Really? *Slow Clap*
Equip a Hero with all Legendary items. Suga how you get so fly?
Equip a Hero with all Epic items. Lookin' fresh.
Die 10 times. Do it. You won't.
Wow, you've actually played this game that much. Impressive.
Geez man we get it, you're good at this game.
10000? Seriously?
You actually SOLD an item worth 50k? Why though...
You only have 12 hero slots though??
Wow, just wow.
Defeat the Legendary Azuros.
Welcome to the Hall of Heroes.
Woooosh
You chose right.
Aww, death is so cute.
I don't even know what to say. I think we should be paying YOU at this point.