Notes: Method #2 is by far the best and easiest method for getting XP while Method #1 is by far the best method for grinding for camos/attachments on guns. You can get any item/attachment you want using the UI stack glitch so grinding for attachments can be useless unless you don't feel like UI stacking.

Fastest Methods: 1: Method #2 2: Method #1 3: Method #3C

#Method #1

• Make a class with the Haymaker and War Machine
• Load up Hypocenter in Realistic
• Once Hypocenter has loaded up, set difficulty back to Recruit
• Get to the Diaz fight
• Disable all three core towers but don't blow the last one up with a grenade
• Stand on the ammo box next to the pillar
• Move in a spot so the bots chase you from below and then stay there
• Set difficulty back to Realistic and start killing as much bots as you can
• When you are done and at the desired level, blow up the last core tower and hit exit #Method #2
• Load up Sand Castle (could set it in Realistic)
• After entering VTOL mode take down every air defense except one of them
• Once there is one left you can set your difficulty to realistic mode and start spawn trapping all of the enemies. They will spawn indefinitely until the last air defense is taken down (so leave that air defense alive).
• Exit after levelling up #Method #3
• Load up Rise & Fall
• Get to the part where you plant the spikes
• Plant all the spikes in the weak spots except the very last one
• Start killing every enemy and going back to the ammo box to get ammo
• After you are done and hit the desired level, plant the last spike and destroy it, then exit Method #3B:
• Instead of getting the ammo box you can also spawn trap the enemies on the right side and steal ammo from some of the dead ones
• After you are done and hit the desired level, plant the last spike and destroy it, then exit Method #3C:
• Load up Rise & Fall in Realistic
• Get to the first battle and set difficulty back to Recruit
• Get to the part where you plant the spikes
• Plant all the spikes in the weak spots except the very last one
• Wait for the talons to come and hack them with Remote Hijack
• Set difficulty back to Realistic while hacking a talon
• Start killing enemies in the talons
• Once the talon dies, set difficulty back to Recruit and wait to hack another one
• Keep repeating the last four steps until you hit the desired level
• After you are done, plant the last spike and destroy it, then exit #Method #4
• Load up the Safehouse in Realistic with a split screen
• With Player 2, head to the chair in the top-right corner and sit in it
• With Player 1, head to the same chair Player 2 is sitting in and attempt to sit in it (if it doesn't work you need to reboot the safehouse)
• Start the Combat Immersion with both players at the same time
• Check if Player 1 has god mode (he will have no HUD)
• IF Player 1 doesn't have god mode, both players need to exit combat immersion and repeat the last two steps
• Once Player 1 has god mode, Player 2 can exit the Combat Immersion arena
• Player 1 can complete the Combat Immersion
• Once Combat Immersion is complete and you still want to level up, just start the Combat Immersion at the same time with both players again and repeat the last steps until you hit the desired level
• Upon hitting the desired level, exit the game