This page is a walkthrough for The Doomsday Heist Preparation Mission, Onboard Computer. It’ll navigate you through the necessary steps to successfully acquiring the module.

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Overview of the Onboard Computer mission.

Shoot down a prototype Hydra and recover the enemy’s broadcast signal from the crash site.

Damage the Jet / Recover the module from the cockpit¶

Once you’ve started up the mission, take any car and head to Fort Zancudo to steal a jet. You won’t get the military on you as you’re on a mission. Upon acquiring the jet, fly over to the hydra which is marked on your map and use the jet’s machine guns to damage it.

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(1 of 3) Head over to Fort Zancudo

After you’ve dealt enough damage to the jet, follow it to the crash site and then go to the cockpit to collect a module. Finally, return the module to your Facility quickly as you’ll be sending out a global signal.