Achievements

Notes on various achievements:
 * Hoarders Unanimous Solutions - You may sell a stack of 100 to complete this. You must receive gold for the items to count, so donations do not progress this achievement.
 * You're digging this! - Cannot be completed in Descent mode, because the Cobalt Pickaxe is unobtainable.
 * Foodie - You may create 50 of the same dish; however, you must craft each dish individually, not via crafting a full stack at a time.
 * Handle It - The Undead Whelp is a very rare cosmetic pet that can be found randomly on any difficulty, from any source of item drops.
 * Which Portal is This? - Resetting the dungeon on Normal may be necessary. Normal worlds have a 50% chance of spawning one portal, while Nightmare and higher are guaranteed at least one.
 * It had to be Slimes - This includes the small versions of Gelatinous Cubes (Green, Blue, and Orange)and Toxic Jellies.

if you would like a detailed guide you can check out Saurvivalist's Achievement guides