AereA is a newly announced action RPG in which music plays a pivotal role given how your goal is to restore balance to the world by finding and returning the nine primordial instruments. While the premise appears to be somewhat insane the concept itself is quite solid. You have four different characters to toy around with, each with their own unique set of abilities, and a whole bunch of locations to explore before squaring off against a variety of unique (and musically themed) bosses.
If you're still confused you can check out what all of this looks like in-game through the recently posted trailer. There is unfortunately no actual gameplay on display, but you'll at least get an idea of what type of atmosphere AereA is aiming for. Have a look:
Since AereA is still in early development the only additional piece of information I can give you is that it features local co-op. As you might imagine, each player will control their own unique character, but how exactly all of this will work I simply do not know.
If you would like to follow AereA's development make sure to occasionally visit either Steam or the official webiste, but don't go there right now expecting to find out more details - there simply aren't any. And since I can offer very little else, here are some colorful images to send you off: