Nobody Saves the World
41 Achievements
20-25h
GOG
Whaddya Buyin?
Make a shop purchase
49.9%
How to unlock the Whaddya Buyin? achievement in Nobody Saves the World - Definitive Guide
Save up at least $500 by smashing things and looting monsters; then, when you come across the store lizard(?) here and there around the world, I recommend buying the "Infinite Quest: Kill Baddies" first (that way everything you kill from then counts towards leveling it up... infinitely).
Refer to One of Everything, Please! (15G) for more information.