Ring of Pain
138 Achievements
GOG
Matching
Wear items of the same set in the Head, Body, Legs, and Feet slots
1.9%
How to unlock the Matching achievement in Ring of Pain - Definitive Guide
Very straightforward achievement and you will most likely achieve this while attempting the other set specific achievements. Must be done in a single run. The fastest way to obtain this is to start a new game with the candle that allows you to select which sets will spawn, limiting the spawnable options for the run