Many things are stronger together. People, animals, machines that work together, etc.
Pick something. It can be really really broad. For example, you can pick animals because they are stronger together.
Ok so let's say you picked animals (u pick whatever) now take that section and find a smaller section like PENGUINS
Yay now the game's about penguins being together (again, this is just an example) now you have to think of the question WHY?
Why is your character here? What does he/she want?
Maybe in our penguin game this penguin got lost and wants to rejoin the group. Maybe they're trying to get offspring. Or fish. Idk.
Also if you do like this penguin idea you're welcome to use it cuz my thing is actually about flies