Alert level

From Red Faction Wiki

Green Alert

EDF will not attack you in Green Alert. To start missions your alert level MUST be at green.

There is a cheat which you can toggle that aloud you to have no green alert at all time.

Yellow Alert

EDF will attack you but will not call for help.

Orange Alert

EDF will now call for help and gunships will now start to attack you.

Red Alert

EDF will now do whatever it takes to stop you.