Wow that question surprised me mate. Now I really do now you dont play games often at all. Halo was absolutely MASSIVE on Xbox and I mean Massive.
Alonng with WoW (world of warcraft) it gotta be one of the most popular on the planet. Guess who was involved with its production......yep you guessed it
meh, never really cared for the Halo francihse to tell you the truth- and yes i have played them both solo and multi (lengendary mode for me )
but multiplayer feels ... not fun... compared to,say , counter strike source