I know this is the wrong forum, but the halo wars forum is dead.
https://forums.halo.xbox.com/yaf_postst110147_How-come-Halo-waypoint-says-I-haven-t-played.aspx
this is the wrong forum to post this in and you should know better. if you really are that desperate to find a answer then ask in the halo waypoint forum or go to another.