Diamond Casino Silent & Sneaky Heist: Approach Specific Prep Missions (Nano Drone, Vault Lasers, Infiltration Suits, EMP)

This section of our guide focuses on the prep missions specifically chosen or mandatory for the Silent & Sneaky approach to the Diamond Casino Heist.

Completing these will provide unique advantages and essential tools for your Silent & Sneaky approach.

Nano Drone

This prep mission is a mandatory silent and sneaky approach specific prep mission. You need to destroy five LSPD deployed drones. After you destroy the drones, collect their scraps and bring them back to the arcade so Lester can create a nano drone for you.

It is recommended that you have either an Oppressor Mark II or a Buzzard to carry out this mission. A good thing about this mission is that you can collect the fallen drone scraps whilst you're in your vehicle.

Vault Lasers

You will need to steal two vault lasers from a specified location. However, the location will be guarded by Merryweather and heavy army personnel.

So make sure you are prepared to engage in combat and take them all out before finding the lasers at the specified site. It would be easier if you have another friend with you to carry out this mission. However, doing this mission solo is completely possible.

Infiltration Suits

Getting sneaky infiltration suits is quite difficult compared to the other prep missions. The infiltration suits will mostly be inside of a police station.

The fact that the whole police department will be on to you the second you step into the restricted area of the police station makes it 10x harder to complete. Especially if you are doing this solo.

When you get to the police station, make sure you park you vehicle right outside the entrance so that as soon as you get the outfits, you can instantly hop in your vehicle and get away from the cops.

You can go to the nearby sewer tunnels to lose the cops as shown in our video guide. If you have an Oppressor Mark II, it will make your life much easier as you can just fly away and lose the cops easily.

EMP Device

It's debatable whether you need to do this mission and doing so is entirely up to you. Since we use it in our heist finale and it makes the heist much easier, we recommend you do it though, and get the EMP device.

You will need to go to Los Santos International Airport and take out some guards protecting a Cargobob. You can get a Buzzard and head to the airport. Land on any one of the suitable buildings around the Cargobob which gives you a good vantage point and snipe out the guards. They will shoot back, so make sure you take cover while doing so.

Once you've killed them all, get into the helicopter and go to the ULSA and pick up the EMP device using the Cargobob. Don't worry about the guards there, just focus on getting the EMP with patience.

Once you have the EMP fly to the power station. However, as you are on your way to the power station you will get 3 stars wanted level. Just avoid the cones of vision of the cops and they will eventually leave you. Since you're flying, it is relatively easy to lose the cops. After you deliver the device your mission ends.

Once you've done all the prep missions detailed here, you are well-equipped and can proceed to the final prep board to choose you entrance and exit point, as outlined in our Heist Finale Walkthrough guide.