i found a way to kill mechs easily you need mech reaper go to the mech like extremely close and when it fires it can't damage you but if there is more than 1 mechs you re dead
the second sas reminds me a little of black ops the first sas reminds me of natch der untoten in world at war or hardened edition and the insane asylum version reminds me of verruckt(still hardened edition and world at war) anyways i wish this has multiplayer for all sas zombie assault games