If only LEGO had made Halo sets then this MOC(My Own Creation) of the UNSC Battle Pack but have been excellent.

Fight against the Alliance with the whole Forces of the UNSC! Take part of the fight against Grunts, Brutes, Jackals Elites and many more! Scaffold your army with the brand new HALO UNSC BattlePack and prepare for one of the biggest fights you have ever seen! Included are two gun racks filled with lots of cool weapons to arm your UNSC Forces the way you like. Also included are 4 UNSC Marines, 1 UNSC Marine Commander and 1 ODST Trooper.

Creating alternative LEGO sets is a great idea and the minifigures all look very good.