Remember the mysterious listing on the ESRB about Aegis Wing? It’s real and it’s coming out this Wednesday on the Xbox 360 for free. Aegis Wing is a 2D side-scrolling shmup designed by Microsoft interns: Scott Brodie, Danny Dyer and Matt Monson over the course of a summer. The final product has four player online play through Xbox Live and six stages to play through. It’s free “for a limited time” so grab when it goes online this Wednesday.