Interact with four switches around the map. First switch is outside the spawn workshop building. Second is within the busted bunker near the Sten wall chalk. Third is inside the entrance to Der Bunker. Fourth and final switch is at the cliffside bunker at the end of the level, parallel to the STG-44 wall chalk. Activating all four switches with enable an activation noise. Go back near the power entrance and interact with a Samantha Doll and it will spawn four duplicates around the map. Listen for every doll and their jingle. The first Samantha Doll is in Der Bunker next to a small display and a crate. The second doll is near the stacked sandbags at F Trench. The third doll is at the cemetery. The final doll is sound back at the busted bunker near the Sten wall chalk. Incompleting this trial within 90 seconds will require the player to wait until next round, where it will begin again automatically. Upon completion, head back to where you first interacted with the doll outside of Der Bunker in the mud to get a free Max Ammo. The Easter Egg song will then play. The song is tied to your sfx volume so mute your SFX audio if you desire to mute it. Song duration is roughly six minutes.