Step 1: Locate the mech

Step 2: Find a host to take over (Only one host is need, otherwise it won't work for you)

Step 3: Get in the Power Armor mech

Step 4: Unleash hell on your enemies

Step 5: Profit
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Tips and other infomation
- Works in co-op (Make sure the Point Man spares one enemy for you to do this)

- The Bridge and Airport mission only have two or more mechs later

- When you're in the mech, the time until your host expires is reseted upon entering and exiting the Power Armor

- When inside a Power Armor mech, the timer is setted to unlimited

- You don't need to mess with the game's files, just play the game and follow the guide carefully.