There can be multiple game modes. Maybe three, the first would be where you only have white guns, no perks and the different guns would be all the different types of guns (Ex: Pulse, AR, Scout, Etc.). Maybe the entire loadout could change and you would have to get a kill with each gun. For the second one it could be the same thing as the first but with random legendaries, and for the last it could be true gun game with exotics. [spoiler]qauk[/spoiler]