To activate the Sleepwalking Easter Egg, we need to progress to Round 11.

In Round 11, interact with the clock in the Study to begin the Easter Egg.

Once you’ve interacted with the clock, you need to kill zombies until only a handful remain.

IMPORTANT: ALL PLAYERS must complete this step together.

Next, head to the Director’s Quarters, lie down on the bed, and kill the remaining zombies while in this position.

After the last zombie is defeated and the round progresses to Level 12, the screen will go dark.

Next, all players need to crouch and follow the footprints on the ground. Continue following them until you reach a horde of zombies.

In this horde, there will be an armored zombie. From this zombie, you can obtain a key.

Important: The armored zombie must not be killed.

Once you have the key, you can head to the loot box and collect your reward.