Versus mode sells it for me. Why fight the zombies when you can BECOME them? its so much more fun hulk smashing people as a tank then fighting a tank!

Get to know the reins of it and suddenly Garry's mod isnt just making vehicles out of couches or bathtubs, you then can put ROCKETS AND GUNS on them too

Its free, its massively fun, its multiplayer, its like a cartoony DayZ, which makes it a much more casual experience. 9/10 nice job Mr. Sexton