It functions, but barely.

For some ♥♥♥♥♥♥♥ reason, there are 2 Chapter 3's. Not like two copies of the same Chapter, there are just 2 Chapters that are apparently Chapter 3.

Every horde was seemingly endless. I don't think there was any point at which there was downtime EXCEPT the finale.

Speaking of which. Finale? Really ♥♥♥♥♥♥♥ dull. It's an open field. You can see where the infected are coming from, and, due to the fact that two snipers are given for this Chapter, you can snipe them before they even show up to you. Same issue with the tanks.

tl;dr Cold Stream was better than this.