Gears of War 3 - Helping Hand

Head up and around the crates to the right and you'll have to walk across a pit of immulsion. When you get out, walk towards the park area up ahead. You'll find some assorted Lambent throughout the area but of particular interest is the "Gunker" to the left. He's the big hulking thing (maybe formerly a boomer?) that is lobbing immulsion at you. You want to aim for his chest and just unlead as much as you can. DO NOT APPROACH HIM. If you get close to him, he has a one hit melee and it's got quite a bit of range. Just shoot and dodge and continue. explosives can also work well here. Once he's dead, get clear of the big explosion.

Leave the area by the back left and watch Carmine get shot in the head. Stroll through the stranded camp and when you get to an area over crowded with shipping containers, take a U-turn to the right and around the back. Behind all the shipping containers will be a newspaper on the floor and inside the shipping container next to it is a boomshot. Continue to follow the leader until you get to the end you'll find a nice heap of ammo. Grab some and then continue on down the docks. Once you go through the big red gate, hang a left and then another left around the wall. Head down by the water and there will be a body and COG tags. Head back up and along the pier and stalks will erupt from the water to the left and you can flank right through some crates. Take your time and work your way up. There's no rush and there's little chance of getting surrounded. Go through the big door at the end. Run through the warehouse area and over the bridge to get to the end.

Watch out for the stalks that come up behind you. Each one will drop a Gunker. if you just focus on them, they will explode and take out the stalk they just came from. Personally, I found the van to the left side to be excellent cover because they couldn't shoot over it. Once done, enter the stadium.