This is just a suggestion, but maybe the classes could have designated colors. For instance Assault= red, Heavy= yellow (or orange), Medic= blue. Just for identification purposes on the battlefield.
I wish there was a some kind of way to detect the horde to see if its going to attack your compound or not. Because I'm not sure if I should leave or wait to go on runs.
Can you add ( lead ) so I can reinforce an adimantium bunker with it to preserve plant life when I set off a nuclear warhead, or just melt it on some zombies.