Call of Duty: Black Ops III

You need to have every member in the Hatchery to attempt this trophy. See Taking Flight for how to get there.

Before attempting this, I highly recommend obtaining the Ray Gun Mk3 from the mystery box as it makes this a breeze. It’s still doable without it but is much easier with it.

Once inside the Hatchery, head upstairs and take a right. Inside this room is a console with a greenish-blue crystal sitting up top inside a glass barrier. Each person in the game must press at roughly the same time.

After that's done, the windows will temporarily shut and all exits will be closed. Now you have to survive 4 waves of enemies that will constantly attack you and you only get 1 free ammo located by the Pack a Punch machine so don't waste it!

The first 3 waves will only spawn enemies from a specific area (Either the left side, the right side, or the top). The final wave will spawn enemies from every direction and it becomes quite hectic. Each wave always starts by spawning regular zombies, followed by some Mangler Soldiers, then finishing up with another 3-4 Mangle Soldiers. The final wave is the same but sometimes a Valkyrie drone or two will come in as well so be prepared to shoot some of those too.

I recommend sitting upstairs on the left side corner, since no zombies can enter over there and just camp there with the Ray Gun Mk3. You should be able to survive the first 3 waves without needing the ammo pickup. If you're doing it without the Ray Gun Mk3, then it will be much harder but you can also run circles around the first floor if it gets too hectic up top.

Once you complete all 4 waves, the lockdown will end and the trophy will pop. Also don't forget to grab the Dragon Strike weapon from the console once it's done!