The Trainyard

Solo


The best way to tackle this finale is to keep the bots alive with you and, after the finale starts, stand on a specific spot that gives you the best common and tank spawns. Pay attention to the bot position as they can force bad common spawns if they aren't positioned properly.

There are two recommended spots to holdout: the one seen in the video and right next to the white car (where all the zombies converge if you stay on the other spot). The advantage of the first spot is that you can use a pipe bomb to gather all the zombies and possibly end a horde very quickly (as seen on the video, after the first tank), but it can be a bit harder to pull off since bot position is less lenient.

When the train arrives, it's possible to jump inside of it while it's still moving, guaranteeing that the campaign end will trigger as soon as possible. You would just need to take care of the bots prior to it (voting Expert, if you aren't playing on Expert already, and downing them).

Solo Bhop
Does this even need to exist?

Last Man on Earth Bhop
Get a boost from a ramp at the start and hop to the finale radio. After activating the finale, get into the jesus spot beneath the stairs. Rarely, a tank will spawn that will not suicide. After the second tank has died, bunny hop to where the train comes and jump into the train car.