ㅊLone Wolves 50 Team Slayer 50 ㅊ
ㅊTeam Swat 50 Team Doubles 50 ㅊ
ㅊTeam Sniper 50 Team Object 50ㅊ
ㅊMythic Brawl 50 Squad Battle 49ㅊ
ㅊAnd of course: MLG 50ㅊ
Honestly let's think about this.
Halo 3 - Take's skill, in order to achieve the highest level you have to be atleast the highest skill of 50. Then have to get 5,000 experience.
Halo: Reach - No skill, based of Call of duty's ranking structure, don't need skill to get to the highest level.
And honestly I play halo for a reason, for it not to be like CoD, but Reach is like CoD in everyway.