3 player variant - 2 zombie players, 1 hero player

[LabRat]

While playing with 2 Zombie players would require some synergy between the two (thus, seem to be harder than with just one player), there's actually one aspect where playing with 2 Zombie players is easier - when spawning new Zombies. As per the LNOE rulebook, page 8, the two Zombie players are only limited via their color of Zombie, it even says that the two players can double up on the same Spawning pit. Very handy especially if a new Spawning pit appears at a strategic location.

But both of you are right - when playing LNOE or IFOS, my nephew has a harder time managing 4 Heroes than managing all of the Zombies/Martians.