This would be a Halo side game that takes place immediately following the aftermath of the events of Halo 4. You and the rest of your ODST squad are sent into New Phoenix, the city turned Prometheon thanks to the Didact and his Composer, your objective would be to destroy/sabotage the Prometheon beach head that has been established. Let me know what you think and visit my page or add me on Xbox for more news and ideas!
You would also have the ability to move your squad with the mechanics from Operation Flashpoint, Red River.