Safe Cracker Mission Walkthrough (MW3 Zombies)

Act 2 Mother of Invention tries to introduce players to more new activities in Modern Warfare 3 Zombies. Safe Cracker, the first Tier 2 mission, challenges you to secure a weapon stash in the exclusion zone.

You can complete this mission to receive the Quick Revive Perk-a-Cola Can in your acquisition, but more importantly, the crafting formula for the Cryo Freeze Ammo Mod.

• Complete a Raid Weapon Stash contract.
• Kill 30 Zombies attracted by the safe drill.
• Do not allow the safe drill to pause.
• Exfil with the Cryo Freeze Formula.

How to complete the Raid Weapon Stash contract in MW3 Zombies

Open your tac map and look for a contract phone with the gun icon, like the one in the image above. Accept the contract and a Weapons Stash will be marked for you in a nearby building. Go there and start drilling the safe, but before that, I suggest you study all the exit routes in case you get overrun by Zombies.

Once you place the drill on the Weapons Stash, a progress bar will appear on the left side of the screen (see image). For the progress bar to fill, you need to stay close to the safe but going to a different room and moving around inside the building is okay. Meanwhile, hordes of Zombies and Hellhounds will attack you. Stay on guard and take out the threats. By the time the drilling is over, you'd have easily killed 30 Zombies required for the Safe Cracker mission.

Related: Same Day Delivery Mission Walkthrough (MW3 Zombies)

Do not allow the safe drill to pause

One thing you need to keep in mind is that the drilling progress bar mustn't stop. Therefore, you must stay in the vicinity of the Weapons Stash. My building was small and had a ladder leading to the roof, which is where I stayed for the entirety of the contract as killing Zombies from there was easier than the claustrophobic room.

If you accidentally go too far, the progress bar will pause and start falling down. In that case, you can cancel the current contract and restart another one. I also highly recommend finding and completing the Raid Weapon Stash in the Low Threat Zone. That's because enemies in higher-tier areas are difficult to kill, moreover, you'll often encounter special and elite Zombies there.

Where to find the Cryo Freeze Formula in MWZ

Once the contract is over, go to the Weapons Stash and collect any guns from there if necessary. For the final task in the Safe Cracker mission, make sure to collect the Cryo Freeze Formula from the Reward Rift (second image). Now you need to exfil with the formula to add it to your schematics and complete the mission.

Stay tuned to Pro Game Guides for more Call of Duty: Modern Warfare 3 content. In the meantime, head over to our article on Legacy Fortress Location in MW3 Zombies.