Was it something that happened on the seas, or did you have it before you played SoT. Was it from a joke, or did it just sound cool?
Before I played SoT, I played a lot of Halo 5. I was really good with the snipers of the game, and I would call my self the 'super sniper.' However, I like to say words wrong to mess with friends and family, so henceforth came the name SuperSnipper. The 60 just sounded cool and rolled off the tongue, so SuperSnipper60 became my new username.