Get all secret chips in the game which also includes getting the speed chips. You have to collect a total of 110 secret chips to earn corrosive city in multiplayer and you can't use corrosive if you have vehicles to operate corrosive use the are jumps to get to the top of the scaffolding where the statue of corrosive would be and you'll find a console activate the console to materialize corrosive and control him.
Finish Story Mode one time
To put your mining laser to better use barely push on the right trigger until the ammo level rises then pull the rest of the way aim at enemy and fire it takes 5 or 6 seconds but is effective will only work if the ammo is in the yellow I know it works with level 3 mining laser but i am not sure it will work for 1 or 2 i found it out in multiplayer
Submitted By: Michael
Ok, I know that there are tons of you out there who have absolutely no idea how to beat general corrosive when your in the arena if all they give you is a wrench. here's what to do with it. run under one of those metal shelter things. when you get there, use the wrench to take yourself apart. when general corrosive rips it off, he'll think your dead. they will then show a cinematic of you being thrown into the scrap yard, and you'll be free. all your weapons will be there, and one of those car things. pick up your weapons and drive to the launch pad.
Submitted By: iceman
While at Big E's House, take control of the Trooper with the control tether. Then, walk to an area that is outside. Take the elevators until you are at the top. Then you should see a waterfall. You can use your jetpacks to get on top of it. It takes a lot of practice, but you can eventually do it.
Submitted By: Grandgamer119
When you play the level "Mogul Schmogul", reload at the beginning. This gives you five more shots. Also, press the secondary fire button to swing Mogul's club. This kills the "oil thirsty monsters" in one hit, and everything else but a vehicle or turret, too.
Submitted By: SPARTAN-117_
The enemy can kill their own men, by moving around, you might get lucky and let them take themselves out!
Submitted By: Neko
When playing multiplayer, if you destroy enough enemies without getting destroyed yourself you get a message saying "Brawling Bot Supreme". It would be the second message you would receive not the first. If that message shows up you will receive 3 robots that will help you defeat the enemy. The message will show up after killing 6 enemy bots without getting killed. This code only works if you play another person not the CPU.
Submitted By: matt51
Start a multiplayer game with just recruiter grenades as your secondary weapon. It doesn't matter whether you are playing alone. Go to a level with multiple mils, have them be off when not recruited. Recruit two or more, and hide behind one as you pop off a couple of shot at the other one. The one you fired on will fire at you, and thus hit the mil you are hiding behind. They will fight each other and not hit you, while u just stand there laughing. This is best done on the level Tanks a Lot, with 3 mil Titans.
Submitted By: Omega