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Here is my final time on the speedrun. The final cutscene began playing at about 1:07:21. Although this can be a bit tricky when it comes to a speedrun (due to the price of having to buy all the doors as well as acquiring better guns.) It is still a fun and engaging.

Here is a quick guide on how my run went.

1. To start off you want to complete the first time trial to get the wrench. My best advice for getting this somewhat consistently is to use your pistol and knife the first round, buy the M14 and quick revive preround 2. Go for headshots to try and kill quickly until round 4. Got to where the challenge podiums are and shoot the shark (best options will be a nuke, insta-kill, or death machine.) For round 5 repeat earlier and go for headshots with the M14, also using the mines outside to quickly get rid of zombies. However if it is a leaper round buy the Olympia off the wall and crouch shoot the leapers with 1 shot (try not to miss since you are trying to acquire the free perk.)

2. Next you want to buy the right door out of spawn and buy all the way to the MP5k out in the water section of the map. (Just outside power room station A.) You want to train zombies hereusing the MP5k until either round 12,13,or 14 depending on how fast you get points (This is one of the spots where the speedrun doesn't have a clear fast method, which allows players to factor in luck into the speedrun either making it bad or good.) Be sure you trade your M14 or Olympia for the MP5k since you will be getting mustang and sally later. You want to have around 32000 points from there you want to save a zombie and actively start the EE. Around this point depending on the round you want to be somewhere around 13:00minutes into the run.

3. Now you can begin going for the EE. To start buy the door to the right of the MP5k and turn on power as well as grabbing the long part of the Trident. From here instead of buying the door in the power room run all the way back past the MP5k and grab Stamina-Up. Now buy the barricade to the left of Stamina-Up and make your way past the power room down to where Reverse Soda is. Buy the door and grab the first shield part. Run back past power room and buy the door to where our fellow friend is being kept and press the big red button as well as grabbing the handle piece for the trident.

4. While doing step #3 you want to have an active eye out for the Pack-a-Punch sub that is floating around. You want to get into the sub as quickly as possible. Without waiting around for it since that will waste critical time. When you do come across the sub jump into and go to the code panel next to the Pack-a-Punch machine. You need to be quick for this step since you only have a certain amount of time in the sub. At the panel type in BIRD or 2473, after that immediately type in 0HEX or 0439, one more time after that type in 0PIE or 0743. Now if you type those in fast enough you should have around 8 seconds left in the sub to Pack your pistol into mustang and sally.

5. Once you have exited the sub (or if you have not come across the sub yet) head into the submarine testing facility and buy all the doors in there and make your way out the last door leading to where Speed Cola is and make your way into the labs (be sure to grab the pip piece for the shield.) Here you want to find and get the hacker, knock on Dr. Zav's door, and collect the skull in the desk drawer. once you have done these three things you can buy the other 2 doors in the labs and buy the door near PHD as well as the barricade blocking the stairs. With the hacker you want to hack the console above PHD for later when we need the Gersh device. Also you can hack the perks you got from the leapers to get money refunded and the perk slot back. I recommend Quick Revive, Juggernog, Stamina-Up, and PHD. Once you get the perks you want and the trident tip near Jug go and buy your way through tunnel 11 to the biodome and collect the last shield piece and build the shield near the teleport for the heads. As well as crafting the Trident near spawn. All in the meantime you are doing this every time you pass the man hack one of his consoles, as you go about doing these other things listen for the beaping and press the button to link it to the guy doing so 4 times in total.

6. Once the women tells you there will be decompression in 60 seconds make way to the labs a using the mustang n sally blow up the glass. Do this also in the Cafe where Jug is, Submarine launch facility and the power room station A. Now once there has been decompression in tunnel 11, biodome, and submarine testing facility you want to hack the excavator control panels for all three after that run all the way back past the submarine testing facility and grab yourself the golden ABA. Once you teleport back to the map go back to the submarine testing facility and begin Samantha Says (should be easy even with a sprinter due to the fact that the place is under water.) after that acquire the code from the game and make your way to the Pack sub and enter in the code to acquire the valve.

7. When you exit the sub you should land near the power room station A. From here use the jump pad and run through the left door and place the yellow valve. Run through spawn up towards Jug and place the Blue valve. Run through tunnel 11 to the left where the Gersh soulbox is and place the Red valve. Finally run back through tunnel 11 past the shield and teleport into the submarine testing facility and place the Green valve.

8. From here is another tricky part of the speed run that is a mixture of some luck and some skill. You want to acquire the valve code near our fellow friend and make your way behind the biodome, plugging in the code, and begin to escort Dr. Zav. My best tip for this part is keeping the last zombie behind you using your zombie shield to take hits, knife Dr. Zav during his dialogue to make him skip it while killing the leapers that spawn without killing the last zombie and ending the round. Once you are finished with the escort acquire the crystal also known as Poseidon's Eye. By now you are getting to the last steps of the EE right about now you should be somewhere around the 38:00 to 40:00 minute mark.

9. For the next step you need to make sure you finished the first step with our fellow friend in his water container by linking all 4 links around him. Once you have done that go near PHD and the crystals and activate the mine. Now you need to shoot the mine when the second sub comes near it. Be careful as explosion is quite large and will end the round if the zombie is even remotely near by. To avoid this use the jump pad near the mine location and waiting there until the sub comes by using the jump pad again and shooting the mine before the zombie respawns. After you shoot the mine wait for the sub to crash and take the uranium using this path to get to the man. Go underneath the Cafe, into Cafe, into tunnel 11, into biodome, into submarine testing facility, finally reaching the man placing the uranium into the tube (make sure you get close enough to activate the dialogue as I had to learn the hard way.)

10. Now we can do the lock down step. From the people who have speedrun this already did the mini-boss fight before this acquiring the fist. However, if you do the lock down stages first when you complete the second lock down phase normally a Bigger boot guy would spawn. But if you have never done the first mini-boss fight the Bigger boot guy never can spawn allowing you to get right into the last phase of the lock down without having to deal with him. HOWEVER, before you do this lock down step you need another gun besides the mustang n sally because the ammo wont last for this full step (This is WITHOUT A DOUBT the luckiest part of the run. The moment that quite literally will make or break runs. I recommend a total of 3 box spins with hacks after each spin. Any more than that and you could be easily jeopardizing the run.) I recommending trying to get out of the box either the wave gun, raygun mark 1, or raygun mark2. once you have one of these guns you can begin the lock down step. You can do the lock down without packing your wonder weapon as long as you have a good amount of ammo in the mustang n sally.

11. After you finish the lock down and turn on the secondary power stay in that room and begin filling up the soul box to acquire the free Gersh's. After the souldbox is full head into the biodome pantheon and place the skull. Acquire souls for the skull and enter into the mini-boss fight. The mustang n sally are really good at taking out the Bigger boot guy. after beating the mini-boss head out of the biodome into the labs. go where you got the skull and where Mule Kick is and punch the painting acquiring the vrill device.

12.From here you want to get into the Pack sub as quickly as possible. Once you have done so type in the code panel 9355 to get free QED'S (note you can not type in 9355 and get QED's unless you have done the mini-boss fight to get the one-inch punch.) After exiting the sub make your way to the guy so he can say his dialogue. when he is finished go near the power room station A and throw the QED at the blinking light outside the map (try not to miss for if you do miss you will need a max ammo, which isn't hard to come by in this map you can type FULL in the code on the sub for a max, which will greatly hurt the time of your run.) Do the same thing to the other 2 blinking lights outside the map. One near Speed Cola on the left side, and the other near where the free Gersh soulbox is. Also when passing by the soulbox see and remember what code it is.

13. From here keep an eye on the pack sub as you are gonna want to jump into it and type in the Gersh code and acquire free Gersh's. run back to our guy in his water pod and place down the vrill device, uranium, and the crystal. As well as listening to his dialogue. after that throw a Gersh in front of him and wait for him to disappear. After that you will be given all the perks in the game.

14. The final step before you go into the final boss fight is to grab the vrill device as well as buy the MK16 in the room where we just teleported the man. make your way back into the Pack sub and pack the MK16 (when the MK16 is packed it has a grenade launcher attachment which is hepful during the boss fight.)

15. Your kit at this time should be Golden ABA, All Perks, Mustang n Sally, A Wonder Weapon that is not the Harpoon, a Packed MK16, And finally Gersh devices. At this time you should be around the 1:00:00 hour mark as you enter the boss fight.

16. BOSS FIGHT
For the boss fight I recommend you wait for the Leviathan to do his entrance animation before throwing a Gersh. Once you throw the Gersh unload all your Mustang n Sally ammo into the Leviathan's eye after that switch and begin to unload your Wonder Weapon ammo (In my case it was the Raygun Mark 2.) When the zombies begin to aggro back on you throw another Gersh and unload Wonder Weapon ammo on the Leviathan by now phase one of the fight is done. The second stage is the hardest of the three to complete. In order to beat the second phase as quickly as possible I suggest using all your Mustang n Sally ammo on him, pull out the Trident shoot the zombies while meleeing the Bigger boot with the Trident (they nerfed the trident to not damange the boss as much as it use to. however, the programming to reduce the damage was not applied to melee allowing you to effectively 2 shot the Bigger boot guys, but since he is the final boss he has way more hp.) After using the trident carefully on the boss throw a Gersh and begin using your Wonder Weapon on him. You might also run out of Wonder Weapon ammo as did I. No fear though as we have the MK16. Use the grenades on the Mk16 before using the regular ammo. Give it a little time and fire power and he will go down. The final phase of the fight is just like the first. Wait for the Leviathan to do his entrance animation, throw a Gersh and unload your Mustang n Sally ammo into his left eye. After that throw another Gersh and unload your Wonder Weapon ammo into him. By then he should fall and you will complete the EE Solo.

17. Be sure to screenshot the ending before the final cutscene and share here that screenshot here so others can see how you did.

Good Luck on the Speedruns! Hope this helped anyone looking to speedrun this Solo EE!!