It just doesn't feel the same having the order mixed up, and there are so many maps it's almost impossible to finish in a single sitting. I also miss the terminal levels bookending KTAII.
Otherwise, there are some great new maps in this pack, and the co-op bug fixes are appreciated. A+++ WILL HOST AGAIN.
KTA3: The Complete Masterworks is every Kill Them All map to date, as well as 12 new maps, in one massive 38-map mega-mini-scenario adventure.
If you want to play co-op, using Co-op.lua is nearly a requirement.