Answer:
Achievement files are located in the folder
xtask/lua/achievements/*
Within this main folder, achievements will be placed in category folders. This helps organize achievements and make it easier to locate them both file-structure wise, and also in-game. Ensure that if you are creating a new achievement category folder or file; you abide by the same rules as you do when creating an addon folder.
- Folder / file should NOT contain any spaces or special characters.
- Folder / file should only have alpha characters and underscores.
- Achievement files MUST end with .lua
