For Our Skyline 

developed by Rotorist Workshop.

A 3D helicopter shooter set in a futuristic city that you must defend.  Still in very early development, with mostly placeholder art.  That being said I already like the low poly look, so it should be pretty exciting to see what it looks like when refined.

You can download the pre alpha here to give it a test.  If you have any feedback, the developer would love to hear it. :)

via /r/gamedev