To get to the Carnival of Doom in Once Human head to the Junkyard in the very southern part of Broken Delta. Here, you’ll find level 19 Rosetta enemies surrounding a revolver.

DOOM: The Dark Ages offers a classic Doomguy face sprite option for the HUD. Players can customize other gameplay details like enemy orb speed and shield saw parry timing.

Now, head to Warehouse 17, deal with all the Rosetta Agents in sight, and take a left. You will come across a glowing revolver. Interacting with this will start the Carnival of Doom side quest.