Collect All 4 Elemental Rocks

Stone 1: Dig 15 dig sites to collect the first stone
Stone 2: Get trap kills in the door of the middle building to collect the fire stone. (Must turn on trap in afterlife on the roof)
Stone 3: Teleport from all 3 locations to collect the third stone
Stone 4: Drops from the rocket shooting boss around round 8

2: Place The Stones In The Stone Room

Open up to the pack a punch area and go downstairs to place the stones in their respective holders.

3: Upgrade The Elemental Stones

Wind: Pick up the wind stone from the stone room and you will then find a glowing yellow rock outside of the shield room near the flogger. Shoot it with the wind stone and follow it. After shooting it over the cliff, it will go to the labs. After you complete the shooting and following sequence, collect souls on the pedestal where it stops. You can now pick up the upgraded wind stone.

Lightning: Pick up the lightning stone from the stone room and head to the pedestal in between the flogger and teleporter. You can then click on the lightning stone to begin upgrading. Follow it to the teleporter while killing dogs. You do not have to teleport. It will teleport to the middle building near the glitch gin perk. Same thing. Follow it to the teleporter. It will then teleport to the phd flopper room below jugg. After the third time, the lightning stone will be upgraded at the pedestal for you.

Fire: Collect the fire stone from the stone room and go to the prison area. Pick it up in prison and you will have to run to the blue fire locations in a certain time limit. Near the stairs, just outside the building to the left, near the shield building, take a right and inside the broken building near the hole in the ground, then in the jugg room in the corner, then place it on the pedestal to receive the upgraded fire stone.

Ice: Pick up the ice stone from the stone room and head to the meteor just outside of spawn on the dock. Click use and go collect souls in the cave. After this the ice stone will be upgraded and ready to pick up at the meteor.

4: Collect A Part Using Each Of The Elemental Stones

Ice: After upgrading the ice stone, kill a rocket shooting boss with any gun and he should drop a red skull (possibly on the next round after upgrading). Shoot the red skull with the upgraded ice stone and pick it up.

Fire: Shoot the top of the red pillars near pack a punch to start a lock down sequence where multiple bosses will spawn. After completing, pick up the mutated sap from the pedestal.

Wind: Shoot the computer on the second floor of the middle building near the glitch gin perk to activate the computer panel on the opposite side. Enter the code in the right order by pressing use on the symbols. It will indicate if you get it in the wrong order and is pretty easy to figure out. After this an ice engineer will spawn on the second floor near the computers. Kill him to receive the specimen.

Lightning: Shoot the electric canisters on the side of all 3 teleporters. Activate the teleporters to spawn an avagodro that you must kill at each teleporter. The last one will spawn multiple so be careful. Pick up the item.

5: Get the Hells retriever

Go into afterlife to activate the 3 pentagrams around the map. Stand over therm and click use. Near doubletap, bottom floor of labs near ice stone, and above the shield room. Collect souls in all 3 to receive the hells retriever.

6: Collect ragnarok parts

Using the hells retriever, collect 3 rag parts. Locations: In a window next to the flogger, in the basement of the broken building near the furnace through the crack in the door, in a hole in the ground near the fence debris and the mp5 wall buy.

7: Use The Ragnaroks To Collect 3 Numbers

Slam the ground with ragnaroks on a metal grate on the ground to open the numbers. Locations: Prison entrance near the teleporter, on the stairs near speed cola, and in the phd flopper room.

8: Enter The Numbers Into The Number Pad

Using afterlife enter the numbers in following order: Stairs, prison, phd room. The numbers are entered in the teleporter room near jugg on a number pad. If you get it correct there will be a 60 second timer.

9: Teleport to a mini boss fight

Kill and survive.

10: Collect Blue Glowing Skulls In Afterlife

In afterlife you will have a limited time to collect these skulls but it will refill your meter when you get one. Locations: Above flogger, in the corner near the lightning stone, on the roof near flogger, above the tank, near jugg, near doubletap, near the mp5 wall buy, near prison entrance teleporter side, in the boiler room up the ladder.

11: Activate The Lock Down

In the stone room place items in the glass chamber on the teleporter and activate it. This will start a lock down. Complete the round to get perkaholic.

12: Activate the teleporter again to be sent into afterlife. You must jump into the lava to be teleported to the boss fight. You will have to collect souls on the pedestal after the second round. Solo is full sweat mode activated so go hard! Complete the boss fight and this will end the game with a cut scene!

I will continue to edit this guide to make it more accurate and helpful for you guys.