I need a goal!

In the next 6-12 months, I want to make some games using Unreal Engine 4 to add to my personal portfolio. The problem I m having is finding the subject matter and genre for the game. I m very goal driven so something that could also be used for a competition or event would help me get motivated to work on it. It would need to be a novice competition where the criteria is given in advance and you have weeks/months to work on it.