Saints Row: The Third/Act 4

With Steelport being controlled by STAG through highways and around Saints HQ, your going to need to go through extraordinary lengths to end both STAG and Luchadores leader Killbane from dominating the arena any further. But not without a few more twists.

Air Steelport
Follow the GPS to meet up with Viola. A cutscene will show you sneaking in. You start in the middle of the cargo. Try to open the door first. It's made of steel so Viola suggests you search the cargo for something useful. Shoot down the men in red and orange suits. Once it's clear, go to the furthest treasure marked with the yellow target to get a gadget called "Sonic Boom". It's not the famous blue speeding hedgehog! It's just a weapon with the "boom" power to open doors and later on be able to blow away items with destroying it.

Go back and open with the new weapon. Take care of more gunmen before opening the door with the new weapon again. Oops! Your new weapon has destroyed the cockpit so run to the end, ignoring more gunmen and into the tank. The next part is similar to the beginning but having a lengthy dive with a tank. Got to have lots of height to pull it off and using the parachute to land. Anyway, you'll be attacked by various gunmen, tanks and military aircrafts. Once your tank is badly damaged, bail! You might get on the second airplane but it got hit. So you have to dive down into the last tank, ending the skydiving sequence.

The cutscene shows a protestor got knocked down by a tank and an airplane with dangerous chemicals, turning normal civilians into zombies. Yes, zombies! Just hope you remember to by a car repair shop prior to the next mission. Or the zombies might overwhelm you and your ally when you come back to that place in the small central island with a few bridges lifted up to avoid a zombie catastrophe.