These are the steps to complete the easter egg for origins, unfortunately i have not finished it but this is as far as i got

Step 1 - Turn On power on all 6 generators

Step 2 - Find all parts for the staff's

Fire

Get The disc (Near the perk juggernaut)
Get the two parts from either killing Panzer Soldat (Shoot in head kills faster) or from the reward box.

Wind

Get the disc (Located by Generator 6 , behind church)
Get all three parts inside the robots that come through the right,middle and centre (Shoot bottom of the foot where the light is)

Thunder

Get the disc (Located around pack-a-punch area)
-Use tank to collect parts(Under Church)
First part - is on the right just as you pass juggernaut (jump off by stairs)
Second part - Wait for tank to cool then as you come up by pack a punch a exit is on the left to jump on to
Third part - Keep going and its on the right just before the church.

Ice

Get disc (Located by generator 2)
Use Shovel to dig up All three parts (Has to be raining)

After getting all the parts head over to pack a punch and head down the stairs and there you will find a music player pick it up and place it to your right to open up stairs to obtain the staff's BUT first you need to pick it back up and go over to any "Crazy place" entrance and place the music player down and a portal/teleporter will appear then enter it. Then grab all of the gem/crystals (located at the different color stands.

After you have all the gems/crystals head back over to the stairs underneath pack a punch and go and craft your staff.

Step 3-

Go to the Crazy Place with all 4 staffs and solve the 4

Thunder Riddle (Purple)

Shoot the triangles with the Purple Staff in this order
-3rd from last bottom row
-1st bottom row
-3rd bottom row

then wait 3 seconds and they should dissapear, then do

-3rd bottom row
-5th bottom row
-2nd from last bottom row

Then wait 3 seconds again then do,

-4th bottom row
-6th bottom row
-2nd bottom row

Fire Riddle

There are 4 stone things by the red area,
Kill zombies with the fire staff until all 4 stone things have fire inside them

Other 2 riddles please watch this video, credit to mcsportzhawk

Link - [ Register or Signin to view external links. ]

-Step 4

There is a part with keys , but im not quite sure how to do this part i think it is something to do with blood mode.

There are 4 more challenges for all the staffs

Lightning

Switch all of the sparking dials into the proper positions. Once done, go to the staff room and line the blue highlighted parts of the wheel up with the orb. Once you shoot the orb it will fly up and the rings will reset.

Fire

Underneath the church are some torches with numbers underneath.
If you would like to attempt to crack the riddle feel free but it is hard.
you must use the fire staff to light the torches, try it in the following orders.

7-3-5 then shoot at the blood located on the wall

or

9-6-5-blood 9-3-5-blood , there is also a hidden number 1 behind the crafting table.

Tip- If you hear something positive said on the first number then that number is the first number.

Wind

You will shoot the the 3 balls around the map that have smoke out of them with the Staff of Wind.

The 3 balls will be located in these places:

- By Juggernog
- In the graveyard of the church
- Behind StaminUp

You will need to face towards the excavation site when shooting the balls with the Staff of Wind

You will find 3 yellow circles around the map:

- Generator 6
- 1 in the tunnels
- The other one is on top of the church

You will need the Maxis Drone to destroy the 3 yellow circles.

Go to the staff room and align the blue highlighted part of the ring over the wind orb. Shoot the orb with the wind staff and the orb will fly up and the rings will reset.

Ice

There are 3 flaming chariots around the map:

When you find them, you will shoot them with the Staff of Ice and they will be unlit. Do them within a certain time to do it properly.

Now find the 3 tombstones:

- Go to the soul box near Juggernog. There will be a tombstone behind you if you are looking at the soul box.

- From that tombstone, Take a right and head to the excavation site. Where one of Odin's footprints are there is a Tombstone on the ledge.

- The last tombstone is by the Generator 2 Tank Station. If you look at the dead robot's arm (presumably the name is Loki) the tombstone will be located to your left.

When you find them, shoot them with the Staff of Ice. When you do that, the tombstone will turn blue-ish/purple and you break them by shooting them with a normal weapon. After that go back to the staff room and there will be a ice orb. Shoot the ice orb with the staff and it will fly into the sky and reset the rings.

You now need to stay inside the Crazy Place and kill zombies with your bracers in order to fill up the staffs with souls. You will know if you have finished filling the staffs because the rocks barriers around them will lift up.

-Step 5

- After that go to the crazy place and put all the staffs in the spot where their crystals were.
- Pick the staffs back up and they will be upgraded

Once you have the staffs all upgraded you need to put them inside of the robots.

Odin > Wind Staff
Thor > Thunder Staff
Freiya > Ice Staff

Step 6

-After that, you go back to the staff room and the last holder is in the middle at the very bottom.

First you must place the staffs back in there holding place in the Crazy Place.

Then you will need to go inside of the giants and break the seals:

- In each giant there is 1 button
- You will need to press all 3 buttons and each time you activate one it will say "Fire Link Activated"

And this is as far as i got up to hope this helped please comment if you have any problems.