"You can find the video of Cornish's gameplay here:
https://www.youtube.com/watch?v=5HxCL7LFADk&t=1467s

The challenge chapter is all about completing specific maps with stated goals in mind. This might be to complete the map under a certain timeframe, not use snipers, don't heal, make use of this character to win, etc.

For the most part this likely would have gone a lot better if we weren't lagging as much. We do complete the first two missions without too much trouble-

But then... THE DEAD WILL RISE.... Certainly a mission that really changes up the metrics of this game by a lot I'll say."