Here is the full list of all 55 Yaga achievements.
The base game contains 42 achievements, and there is 1 DLC pack containing 13 achievements.
Help Kuma Lisa eat Oakvale's chickens
Take the Stuhacs' offer instead of the Magic Ore
Steal the Magic Ore without getting caught
Complete the Loan Shark story arc
Collect all the Trinket Kid's toys
Rescue the Vodnik Mother's kids