Halo

Not many people have earned all the achievements possible from Halo 3, Halo Wars and Halo 3: ODST, as evidenced by the statistics Microsoft dug up while developing Halo Waypoint. "Significantly less" than 1% of players have unlocked all the achievements. Based on readers comments and e-mails I received, the biggest stumbling block for Halo fans is a top-tier achievement tucked away in Halo Wars, the non-Bungie developed real-time-strategy...