Chapter 1 - Unbreakable | Act III Gears of War 3 Guide
Last update: 11 May 2016
At the beginning turn around and look at the metal pillar, when you will find collectible #21 (Anvil gate plate).
Use stairs on the right and go forward. At some moment you will see a small room on the right. Get in and take collectible #22 (Watercolor painting) which is hanging on the wall.
Leave the room, turn right and continue forward. In the end you will get into small room without roof. On the ground in the corner you will find collectible #23 (Sam's father's medal).
Now start walking toward to the front gate. When you get there find some cover and start shooting at enemies who assault the fort. Be careful because there are lots of enemies and they can easily suppress you to the ground.
At some moment the reavers will join to the attack. You can easily kill them by using one-shot, which are on the ground.
A few moments later on the battlefield will enter a catapult. Leave your cover and start heading into the base picking up the one shot en route (one of them is near the stairs leading to the courtyard that you have to defend). If you won't be quick enough you will die from catapult missile. When you are inside start shooting the enemies at the courtyard. In the second wave of foes some of them will have shields - you can easily take them down by using one-shot.
When enemies capture the courtyard start heading to the next location inside the base. You will have good point to shoot enemies from the top.
You can also use a stationary machinegun which is in the circle room. It's a great weapon to eliminate boomers who will enter on the battlefield at the end of the fight. When they get in watch out because you won't be able to move (if you are using stationary machinegun) so you will be easy target for foes.
In the end of the mission shoot into fuel tank when it falls on the ground.