The achievement “Rest in Peace” says “Beat an AI opponent on “Peaceful” difficulty in a 1v1 game”. However, the only AI difficulties are Easiest, Standard, Moderate, Hard, Hardest, and Extreme. How am I supposed to defeat an AI difficulty that doesn’t exist?
You are right, there is a typo in the achievement. Maybe they wanted to call the difficulty level “Peaceful” earlier and later decided on “Easiest”.
After you win on Easiest difficulty, you will unlock the achievement “Rest In Peace”.
It should be called “Rest in Easiest” then
They could probably get away with Rest Easy