A Director has a vision of their band performing for the world. The band goes through the process of learning the piece, practice performances, and finally performing in front of judges. Afterwards the reflect on their performance and learn that there is more they need to do to accomplish their full potential. This is fun and not overly detailed so you can make it more towards your style of teaching. There are no boss fights, but there are assignments (Asking the students to record themselves). There is a prefestival performance worked in, but you can change it to a rehearsal where you've invited a colleague to critique. I've deliberately not made this quest "music specific" so that the pieces you pick don't matter. This was specific to my beginning high school band, but I'm sure it could work for other grades. This won't teach the music for you or even give you lesson plans (working on that), but it can give the students another way of looking at why we ask them to do some of the things musically that we do.