I've thought about this topic a lot and wondered if bungie ever considered this, but I doubt 343 would even dare working on a game like this because it seems like they're to lazy to create a broad storyline in detail along with a long campaign. Now there are many aspects that could be added to this idea so please share anything that would enhance the halo experience. This concept of "covenant only" could be just as popular as the master chief halo games. It would give a true and new feel to halo that is much different... instead of as it is portrayed now, basically a continuous storyline and in my opinion the promethians are too simple and have an easy and poor design have ideas of the campaign consisting of a players choice of playing as one of the main covenant species such as brutes, elites, grunts or jackals maybe even the hunters. If I could create this game each species would posses their own style of vehicles and aircraft that compensate for their sizes, and they would also have new weapons from small unique plasma pistols, to grenade & rocket launchers, sniper rifles, plasma mortars, various spike guns and grenades also.The campaign ideas I have are numerous, such as a look into the past before the covenant and humans discovered each other, back in history to a time where many covenant species could be at war with each other and even cause certain species to go extinct these older covenant could even have less advanced technology which would give an excuse for completely different armor, weapons and vehicles to be designed. Or a different storyline could be a time where the covenant are struggling to combat with a flood epidemic on their home planets. Another storyline would be the more original concept with the current war against humans but obviously only from the covenant perspective. Other additional ideas would be for your allies not be so weak and actually survive more often, more hand to hand combat, more interactive objects and reactive backgrounds such as explosions causing anything to fall, buildings to crumble, and enemy bodies to explode or lose limbs. I have other new ideas like playing special missions with your choice of a different alien army factions like a version of covenant navy, air force or tactical teams. I hope this topic will inspire someone to an actual consideration for designing a halo game similar to this and like I said please share if anyone has any other good suggestions