Need help with final boss (spoiler)

[Darklinge]

So we need help with the final boss, we have to stick him with GPS for the satellite. We managed to do this by shooting a part until it's crusting. Then we run to this part an hit it to stick the GPS, but most of the time we die. What are we doing wrong. The second problem is, when we placed two of the GPS the satellite shoots immediately and the person who hit the tentacle die. So any ideas, cause I hate to play the hole level once more for nothing.... thx

[Mc Fly 303]

We did it the same way and it was pretty easy. Best thing is to take cover behind the rocks and shoot together on one part and then have one player stick the GPS. Only thing what I am still uncertain about is when the boss is nearly down and the task is to shoot the barrier. When we focus the action by pressing the directional button down it shows to the wall, and we didn't manage to break it. But finally we completed the chapter without doing this.

[atheistium]

Everyone needs to target with a normal machine gun on the end of a nub.

Then, when it bends down with a crusted rock top, only one person should approach it. Make sure you are near it before you can attach the GPS as you want to pop it on as soon as it comes down. Tab B to place the GPS and JUMP away from it ASAP. This will stop you from dying. Doing it as soon as the option to use GPS comes available will also allow you more time to get away.

Make sure everyone you are playing co-op with understands how to do this. Each player only has one GPS tracker to put on and once you have used it, another character has to do it.

After you will have the break the wall. The camera points to the solid wall and not the breakable wall. Wait a few seconds and keep looking up, you will see a more silver version of the wall creep over the top of the monster. Shoot with with rocket launchers a few times. Eventually a cut-scene will trigger and you have completed the game :)