What is a high alert combat kill for purposes of bonus points and the related achievement? Is it a kill while alert is high or one that sends it spiking (e.g. high rating robots or lots of robots killed at once via explosions, traps, allies)? Do kills during high security count?
I don't play heavy combat very well or much so I haven't figured out all the alert mechanics.
High alert is anything 2 or above, the level at which they can start sending assaults.