This is discussion archived from a time before the current discussion method was installed.
From YKTTW Working Title: Boss trope in need of name
Eakin: Can someone explain to me how this differs from Wake-Up Call Boss?
Diddgery: It's explained right there on the Wake-Up Call Boss page: the Early-Bird Boss is early in the game when you don't have access to certain abilities or items that are available for the rest of the game, and would be much easier if you did.
