(adsbygoogle = window.adsbygoogle || []).push({}); As you can tell their isn't very much in this section so I might as well put this little trick/strategy on how to rank up faster without doing very much at all.

1- Go to survival mode with a friend at Underground
2- Save up all of your money except to buy the predators to take down the pavelows
3- After Round 10 when you kill the juggernaut you and your friend need to buy 2 sentry guns
4- Watch this video to get an idea for where you need to go... pause at 48 seconds in


5- Place a Sentry on Either of the Sides of the Station
6- Camp there and shoot enemy's every once and a while
7-After you have enough money buy a light machine gun with a grip
8- Just fill your ammo when needed and buy predators and delta/riot squads

With this strategy Me and my little brother get to atleast round 26 every time and rank up 4 to 5 levels a game

Enjoy

Just finish all Spec ops missions you should be atleast lvl 30-35, Than just play survival, you'll get high ranked eventually.
you get a nice title for finishing all spec ops missions on veteran =] and a nice title for survival, just play them all finish them till wave 15.

I have been going to other maps and looking for other places will update if i find a really good one