Follow this guide to easily steal the Demolition Charges for the Cayo Perico Heist in Grand Theft Auto V. Includes tips on clearing enemies and finding the keycard.
Alright, so you've picked up the Demolition Charges mission from the planning board on your Submarine. Your first move is to get to the Grapeseed Train Depot. You can either use the sub to fast travel closer, or just hop in a car and drive there yourself. Once you arrive, you'll need to take cover and clear out all the O'Neil Brothers hanging around the depot. Don't rush in guns blazing; find some cover and deal with them methodically.
After you've dealt with the initial group, hang tight for a few seconds. A waypoint will pop up, directing you to the O'Neil Ranch. Head over there and get ready for another fight. You'll need to enter the main building and clear out the enemies inside. Keep an eye out for a Keycard – one of the O'Neils will drop it. Once you've got the Keycard, make your way to the southwest corner of the house. You'll find the basement entrance there. Unlock the door with your newly acquired Keycard and head down to collect the Demolition Charges. Grab those, and then it's back to your Submarine to wrap up this part of the heist.
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