(Oh sorry, forgot to add this before. All credit goes to Convergancy from Youtube. He made the strategy but I just tweaked it a little and wrote it all down for those who don't want to have to watch 8 videos adding up to an hour and 20 minutes.
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A map showing some important locations:
Here's my newest solo strategy.
Stay in the first area for about 4-5 rounds. Knife the zombies for the first round. On the second round, shoot the zombies 6 or 7 times in the chest then knife them. By the end of the second round you should be out of pistol ammo, so buy the Gewehr and try to get headshots from that point on. By getting headshots you'll maximize the amount of points you'll get.
After the 4th or 5th round, open the two doors on the right that opens into the room with the Thompson. Buy the Thompson off the wall because you should be out of ammo on the Gewehr. Hold off in this room for at least 1 round and make sure to watch the two windows are there so that you don't get snuck up on.
Once you've opened up the upstairs room run towards the bridge but don't jump off yet. On the left there is a small area where there's no railing and you can jump down into the courtyard. From that little area up by the bridge you can just hold off there with your Thompson. If you begin to get overwhelmed then you can simply walk backwards and fall down into the courtyard where you have some more breathing room. This spot is found at location number 1 on the map provided up above. Make sure to turn on the power when you have a chance.
You should have racked up enough points by now to roll the box a few times. The two most important things that you're hoping for are the monkey bomb and a large machine gun like an MG42 or a Browning. Hold off in this court yard for the rest of the round.
At the end of the round, run and grab some Thompson ammo then back up to that little area by bridge. Just rinse and repeat the same method that was described up above. If you get overwhelmed in that spot, then just walk backwards down into the courtyard.
At the end of this round, you should have enough to go buy Jugger Nog, Speed Cola, and some Bouncing Betties. From this point on you should roll the mystery box every so often until you get the monkey bomb or machine gun. Now, back up in the spot by the bridge, set a betty down on the bridge, then right near that ledge where you would jump off. Once those two Betties have been destroyed just drop off the edge again.
For several rounds just rack up enough points so that you can go and link all the teleporters. Make sure to leave a zombie running around so that you can link all the teleporters without having to worry too much. If you have enough points left over then use the Pack A Punch machine and upgrade your Thompson.
After this, it's pretty much the same thing. You just start the round at position 1 and then fall back if necessary. You can also run up to position 3 which is the elevated walkway across from Teleporter C. There's a mystery box location there. If needed you can camp there and there's a window which is open so if you run into trouble on that walkway you can jump back down into the courtyard.
Once of the things I've found that really help me later on at about rounds 20+ is to really use the teleporters. Camp in one of the teleporters for a short period of time while picking off each of the zombies. If they get too close to you then you can teleport to the mainframe. The teleporter can also be used as an electric barrier so try to activate when you've got several running towards you. Once you've activated the teleporter, you can run back to position 1 and they will all file in a single line. If you become overwhelmed again then just walk backwards off the ledge.
Now, for every dog round, you should just be able to use your Thompson and hold off against them in the courtyard. Once you've opened up all teleporter rooms there is a little walkway that Teleporter C is on. This walkway has the entrance to the cave attached to it. Now, stand across from the cave entrance while on the walkway and it's the perfect spot to fight of the hell hounds.
Some small tips:
- Make sure to reload on ammo whenever necessary.
- After a while you're going to want to keep running no matter what so that they don't end up cornering you.
- It's ok to use the monkey bomb a couple times, but use it only towards the beginning of the round when there's a lot of zombies after you.
- When using the monkey bomb, try to shoot some of the zombies crowded around it, it's a good way to get points.
I hope this helps some of you guys, and I apologize for this big block of text.