Mission mod rework

[Prefix]

Rework Mission mod so it would be like Zombie Escape mod.
Humans would need to defend the flag from zombies than goes to other levels and wins the round lastly. Should fit into 5 mins period or so.

If there would be specific maps made by it:

Zombies would be closed for some period. Than some entity (door opens), breakable breaks.
Meanwhile, humans go to the point and capture the flag. If they don't capture the flag they lose.
Than humans need to defend a flag for zombies for x seconds, if they defend for that much time they unlock the next stage and that goes until they complete all stages.