Burn, Baby, Burn

You'll start in the Moonflower Trailer Park, just north of the Jail. Find Sharky Boshaw inside. He'll want to burn some Angels with you to the sound of disco. Make sure you're fully stocked on ammo before you agree to help him, because as soon as you do, the first wave of Angels starts pouring in.

Once the music kicks off, Angels will start coming at you from all sides. Your best bet is to stay on the higher ground, like the roofs of the trailers. Only come down if you absolutely have to, to avoid getting surrounded. If you see a big group of them, toss an explosive like a grenade or a Molotov cocktail to take them out all at once. There are more explosives and plenty of ammo scattered around the trailer park, so keep an eye out and resupply whenever you can.

Things get a bit more complicated when Sharky's music player breaks. Now, you'll have to go to each speaker and turn them off manually. The Angels won't stop coming, so keep using explosives on groups and be careful around the speakers – there are explosive canisters near some of them that can take you out if you're not paying attention.

The cultists will also start showing up and shooting at you. Try to take out the pickup trucks they arrive in with remote explosives, especially if you can get them while they're grouped up. You'll need to circle around and hit all the switches. Don't forget the one right next to Sharky!

After you've turned off all the speakers, you'll need to clear out any remaining Angels and cultists in the area to finish the mission.