Follow these steps to complete the Der Eisendrache "My Brother's Keeper"
While opening the map you'll Find 3 Dragons (2 on main floor, One down below), you'll need to Feed 8 Zombies to Each Dragon Grab the Bow Downstairs.
You'll need to Build Atleast one bow (If Solo) to complete all steps, If There are Multiple players All 4 need to be Built. (There are Guides Below)
Shoot the Glowing Prongs on top of the portal Down Stairs with Normal Bow (after one is upgraded). then shoot 4 wisps around map and enter the Portal.
Once you've pick'd up the Fuses and the Soul Canister from the Memory in step 3, You'll need to head to the Death Ray at top and put the Fuses in.
After Picking up the 2 Rods and the Keycard from Step 4, You'll need to insert the Rods up top and play Samantha Says (One PC near the Death Ray and one at the rocket).
Now You'll Need to Repeat the wisp step and shoot the 4 Wisps Around the map, Go back through the Portal and the box in the back will open up Allowing you to grab the tablet.
Go to the Statue Where you Got the Bow and Insert the Vril Device, Follow the Keeper and soul collect with the Correct bow at 4 spots (Placing the Stone From step 6 in the Missing Spots).
Grab All Parts Aroung the Map and Build the Ragnarok DG-4 at a Bench, In Order to Start Boss Fight these will Need to be built. (There are Guides Below for Spawn Locations)
Place Soul Canister from step 3 in the Missing Slot and Start boss Fight by Placing the Ragnarok DG-4 on one of the Glowing Stones on one of the sides of the Pyramid (All Players Need to Place at same time.
