not a bad idea i like how you put every thing together you should add more maps i think like haveing a space level where you have to come out of either a unsc or covie hanger of their ship and have a huge dog fight/ you should have the level covanent/ you should have both forms of high charity (covie and flood infested) master chief should have the ability to use cortona to enemy electronics and give you radar for a short amount of time ( for all players) add the flood and put their strenghts up can still add more vehicles like the short sword, long sword, sereph, ect you should also have the other prophets regret with the elits and mercy with both brutes and elits. and you should also have a place where you can make your own specail vehicle/ customise your vehicles