This does not work unless I'm really unlucky and it works for you. If you play with two controllers in find game or private match and you're host and the other two players leave, the game thinks you are playing split-screen. So you won't get ranked. I didn't try it but was left in this situation several times, I didn't want to end game because I was having fun. Anyways me and my 2nd controller were left in game in 3-4 occasions and we went really high, it did not count towards the leaderboard.
Things to note, when you play split-screen you are able to pause the game. But when you are in this so called 'glitch' you cannot pause game, so you may falsely believe this will count towards your leaderboards. It hasn't worked for me many times, I do not believe it will work for you.
Originally posted by Wondoh
But if the other people leave you will have to fight 3 / 4 player amount of zombies with just 2 people? :confused:
I'm pretty sure that after that round, zombies reset accordingly to the number of players left. I noticed this in many games, or maybe I'm wrong. But I am pretty sure zombies reset to the number of players left.