In the map u can free the mysteryman that says he wants to be free and escape from "her"

THIS WILL TELL YOU HO TO FREE HIM

U NEED 4 PEOPLE TO DO THIS

ALL THE STEPS ARE FROM THE CAMPAIGN

Step 1: Secure the keys

Required: gersh device

there will be an engine that is near the phd flopper, shoot it and it will glow, throw a device and it will pick up a node. it will start the others.

Step 2: Ascend from darkness

You have to go to the lunar lander at the construction site and under the stairs is a computer. press x ( or Square for ps3 ) and an illuminadi sign will pop up, turning on one of the four lights.

Step 3:Rain Fire

During a monkey round, ( get it since the monkeys rain down) u have to get to the perks and a button will pop out next to them. all four of you guys must press them at the same time. Lighting the second

Step 4: Unleash the horde

Required: ballistic knifes

in the pack a punch room u have to fire a balistic knife at the wall, but u have to be under the platform, and a clock will spawn, then all four of you have to stay there and and watch it. when u hear a nuke and see it, u turned on the third light

Step 5: Skewer the winged beast

when the rocket is launched , shoot it and it will explode, then letters will spawn in the sky, you have to spell " LUNA" when riding in the luanar landers. it will activate the last one

Step 6: Wield a fist of iron

Required: crossbow, zeuscannon, raygun, gersh, and russian dolls

And orb ( i hear will spawn) and u have to throw a device at it and then fire everything(somethings a certain number of times) but not the crossbow, and at the end fire one at last second and u will get death machines.

Step 7: raise hell

Raise hell with death machines

Step 8: Freedom

U freed the mysteryman, and after he thanks you, you will hear roaring (which people think says "come and get me") and the screen will go black and white for a second ( telling you some one is upset, which me and my friend call sally because of the achievment, and think she is the little girl that laughs at us when we get the teddybear )

Look up videos on youtube and they will go into greater detail

They dont have to be in order but have to make sense

also people think you have to do many different things with the death machines in order to get " wallderwalfe' ( geting elemental weapons?)

try different things, like in the begining room on the spinny thing you have to shoot a button on it with the death machines, something like...