This is to anyone who has trouble with the robbers base:
1.you need lots of grenades and rpgs(as well as guns)
2.keep going to the base and starting untill you start behind the bunker
3.move all of your people behind the back wall
4 the robbers will not be able to shoot you or move out of the fenced area which makes them a great target
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 "Big Pixel Zombies"){kind=icon}