**Robotic Hands**: You can find the Robotic Hands on Agent Jack's corpse inside the barricaded door which can be opened by turning a zombie near the barricaded door using brain rot ammo mod. The barricaded door is in Hotel Room 305. Feel free to check out our [Free Wonder Weapon](https://www.xfire.com/how-to-do-the-free-wonder-weapon-easter-egg-on-mauer-der-toten-cold-war-zombies/) or [Building Klaus](https://www.xfire.com/how-to-build-klaus-fully-upgrade-him-quick-easy-guide-mauer-der-toten/) guide to learn more about getting the Robotic Hands. [https://www.xfire.com/wp-content/uploads/downsights/2021/08/Robotic-Hands-1-Mauer-Easter-Egg.jpg](https://www.xfire.com/wp-content/uploads/downsights/2021/08/Robotic-Hands-1-Mauer-Easter-Egg.jpg)
**CRBR-S**: The wonder weapon CRBR-S is one of Requiem's artifacts and can be obtained in several ways. You can get it from a mystery box, by completing trials, or by doing the [free wonder weapon](https://www.xfire.com/how-to-do-the-free-wonder-weapon-easter-egg-on-mauer-der-toten-cold-war-zombies/) easter egg. [https://www.xfire.com/wp-content/uploads/downsights/2021/08/Free-Wonder-Weapon-Intel.jpg](https://www.xfire.com/wp-content/uploads/downsights/2021/08/Free-Wonder-Weapon-Intel.jpg)
**Hacking Helm**: The hacking helm is crafted on Klaus by collecting three headgear pieces as part of the main easter egg quest on Mauer Der Toten. Check out our [main easter egg guide](https://www.xfire.com/mauer-der-toten-easter-egg-guide/3/#crafting-headgear-round-manipulation) on how to acquire the pieces and craft the hacking helm on Klaus. [https://www.xfire.com/wp-content/uploads/downsights/2021/08/Hacking-Helm-Intel.jpg](https://www.xfire.com/wp-content/uploads/downsights/2021/08/Hacking-Helm-Intel.jpg)
**Rico's Keycard**: This is found on a train stopped by Klaus as part of the [main easter egg quest](https://www.xfire.com/mauer-der-toten-easter-egg-guide/5/#upgrading-klaus-the-train-step). [https://www.xfire.com/wp-content/uploads/downsights/2021/08/Ricos-Keycard-Intel.jpg](https://www.xfire.com/wp-content/uploads/downsights/2021/08/Ricos-Keycard-Intel.jpg)
Warhead: The warhead is also found on the train during the train step as part of the [main easter egg quest](https://www.xfire.com/mauer-der-toten-easter-egg-guide/5/#upgrading-klaus-the-train-step). [https://www.xfire.com/wp-content/uploads/downsights/2021/08/Warhead-Intel.jpg](https://www.xfire.com/wp-content/uploads/downsights/2021/08/Warhead-Intel.jpg)
**Improvised Collider**: This is found during the Uranium and Disruptor Satellite step as part of the [main easter egg quest](https://www.xfire.com/mauer-der-toten-easter-egg-guide/5/#the-uranium-step). [https://www.xfire.com/wp-content/uploads/downsights/2021/08/Improvised-Collider-Intel.jpg](https://www.xfire.com/wp-content/uploads/downsights/2021/08/Improvised-Collider-Intel.jpg)