This achievement may take upwards of an hour and can be done with either 2, 3 or 4 players (Not solo).
NOTE: I've added a video from NGTzombies (Richtofen's and Maxis' paths) for those that would rather a visual instead. I take ZERO credit for the video.Step 0, PERSISTENT UPGRADES (OPTIONAL):
Before you begin it might prove useful to have persistent super revive and 200% health. These upgrades can be earned whilst playing on tranzit, die rise and buried (NOT grief, survival and turned modes). They are not displayed like normal perks but somewhat do the same job and can also be combined with the normal perk for a substantially better effect for specific perks (quick revive and juggernog).PERSISTENT UPGRADE NAME (NAME WITH PERK PURCHASED AS WELL) WHAT IT DOES
HOW TO EARN AND LOSE IT >QUICKER REVIVE (INSTANT REVIVE)The player can earn faster revives (revives are twice as fast). The effect can be stacked with Quick Revive for an almost instant revivification.
The revives are fairly easy to do with a second controller or a friend willing to help. Leave the last two walkers of wave 1, place the second controller (or that eager friend) in the lava and just revive away! You know when you have done enough as you will see a puff of green dust appear (you will see this with every persistent perk/power-up upgrade).
To lose it, a player must try and fail to revive a downed person, even if said person is later revived. Even an accidental fail (such as being knocked out of the way) will cause the upgrade to be lost.>200% HEALTH (300% HEALTH)The player can earn more health (4 hits like Juggernog). The effect stacks with Juggernog, allowing the player to have a maximum of 300% health (6 hits).
The exact way to how to obtain this upgrade is still unknown, but the most commonly used way to obtain it is to consistently buy Quick Revive in solo play and letting yourself to be downed both times by the SAME zombie.
This perk is disabled but not lost on round 15. The player will not lose the perk by dying from fall damage/falling off the map, explosive damage, or bleeding out and dying prior to the start of round 15; after round 15 however each of these factors will cause the perk to be lost, unless the player is the last in the party to go down.
If you're wanting to know the less helpful but still somewhat useful persistent upgrades check out the call of duty wiki here:http://callofduty.wikia.com/wiki/Persistent_UpgradesStep 1, PREPARATION:
Accumulate a total of a good 20,000 points in each of your banks. If you are unsure where you can store your cash, then you will need to first make your way to the town (the last stop with a pool of lava in the middle and good old JUG nearby!) where you will enter the bank (right in front of you when you get off the bus). Once inside you should notice a vault door across the room. Simply toss a grenade towards it and it will be blown to shit. Upon entering the vault you will see 2 keys on the right (deposit and withdraw). ENJOY! Step 2, COMMENCEMENT:
Start a custom tranzit game on original difficulty (NOT EASY DIFFICULTY!)
Like Die Rise and Buried, if one of you already has the achievement you won't be able to do the first significant step, in this instance powering the obelisk for either side. The workaround for this is to start the game without the player(s) with the achievement and then invite them into round 1. They will then be able to spawn in once the next round begins.MAXISStep 3, POWER:
From the spawn assemble the turbine (manikin, fan and tail fin). All the parts can be found in the spawn room. The manikin is resting against the map of the bus route in the middle, the fan is on a chair right next to the bench and the tail fin is on the floor by the telephones. Remember to pick up one each! This turbine can be used to power the doors that you can't buy like the ones right next to the bench.
From the bus depot take the last crawler/walker from wave 1 on the side of the bus and traverse all the way to the power station. Once at the power station you will notice a lot of scrapped cars and an outhouse straight ahead. Buy open this door (750 points) and drop down into the power room.
To be able to turn on the power you must first build the power switch (switch, control panel and zombie forearm). All of the parts can be found in the power room. Now you must turn on the power and TURN IT BACK OFF!Step 4, EMPs:
Arrive at the town to collect all those points you earned and stored previously. Then, waste all of those hard earned points on the box until one of you eventually get EMPs.Step 5, POWER THE OBELISK:
Make your way under the pylon in the corn fields between the farm and power (from the road you will see an entry next to a car from there you will need to take a left, then a right and then a left once more). Place both of your turbines at either corner of the pylon's base, proceeding to hold out until the electric dude decides to turn up. (usually is between rounds 4-9). Once he is within the vicinity of the pylons base throw an EMP and collect your turbines.Step 6, REDUCE THE POWER:
Place your turbines at any two street lamps. (The easiest are probably the diner's and the bus station's as they are within the "safe zone")
You will now receive a power up at the base of the pylon and an additional one every five minutes or so and should now see orange lights traveling to the top of the pylon. If you want to help out with someone else's easter egg run, you will need to make sure that they're the host and that you join their session in progress (If the host has the easter egg completed, nobody in that game can earn it). However, the game you complete this easter egg in can also give out a free-of-charge acheevo to anyone that joins.
If however you are wanting to complete Richtofen's path then here you go;RICHTOFENStep 3, OBELISK TABLE:
The first thing Richtofen wants you to do is build the obelisk table (made with the meteor rock, table, radio and electric box). If THE HOST has built this before it will already be built (if any other player has previously built it, the table will still need to be built again for the host regardless).
The meteor rock can be obtained from the small crater left in the side of the bus depot at the start(to the left as you exit). The table can be found in the power station once you drop down from tombstone (either in the dark corner or on the crates) or the tunnel in between the bus depot and the diner. The radio can be found on a cabinet in the garage at the diner or in Nacht der Untoten which is located in between the power and the farm, across the corn field (on the other side of the road from the pylon). The electric box can be found in the farm house to the left of the refrigerator or at town besides the dumpsters, the mystery box can spawn by.Step 4, POWER:
Since the obelisk table is now permanently built, I recommend restarting to make it easier on your team. From the bus depot take the last crawler/walker from wave 1 on the side of the bus and traverse all the way to the power station. Once at the power station you will notice a lot of scrapped cars and an outhouse straight ahead. Buy open this door (750 points) and drop down into the power room.
To be able to turn on the power you must first build the power switch (switch, control panel and zombie forearm). All of the parts can be found in the power room. Now you must turn on the power and leave it on.Step 5, JET GUN:
Like all zombie easter eggs, you will need the wunder weapon. The jet gun (made using a coil of wires, jet engine, handle and a gauge) can be assembled at the bench in the bar at the town across from the bank.
The coil of wires can be found in the same area as the table of the obelisk table (down from tombstone) either on a barrel, the box right as you drop down or on the floor near the crates. The jet engine can be found in the tunnel in between the diner and the bus station. The handle can be found in Nacht der Untoten which is located in between the power and the farm, across the corn field (on the other side of the road from the pylon) on either of three shelfs. The gauge can be located in the hunter's cabin in between the power and the town (stay hugging the right side as you approach town and you won't miss it).Step 6, POWER THE OBELISK:
To power the obelisk you must use your jet gun on the obelisk table(seems to work best on the meteorite). Then Richtofen will complain how there still needs to be more power. So, you will have to hold out killing hoards of zombies underneath the pylon (making sure the zombies actually die under it) until you hear Richtofen say "too much power is flowing into zee orbit, you must reduce zee incoming power by a factor of four".Step 7, REDUCE THE POWER:
For this step you will have to throw an EMP at four different street lamps within a short time of one another. If you are playing in four player it will be as simple as co-ordinating the throws simultaneously. However, in two player you will have to both have a teleporter ready under your street lamps so that you both can throw an EMP, teleport, turn around and then proceed to throw another.
You will now receive a power up at the base of the pylon and an additional one every five minutes or so and should now see blue lights traveling to the top of the pylon. If you want to help out with someone else's easter egg run, you will need to make sure that they're the host and that you join their session in progress (If the host has the easter egg completed, nobody in that game can earn it).
Credit to MG Dano296
for additional perma. perk info! Also, credit to NGTzombies for the amazing video guide, be sure to check them out for anything zombies related.
If there is anything you are unsure about or just simply wanting to know about zombies feel free to PM me and I'll be sure to get back to you ASAP.
Hope this helps.