While in the detachment selection screen
Hold down the control key and type Paladin
This ables you to use Knight Paladin units.
During the battle:
Hold down the control key and type:
EYEOFTERROR : To be able to see all enemy units.
HERETIC : Completes the mission.
CLEANSINFIRE : Your hit probability is increased to 100%.
WHITEDWARF : Makes all your units invulnerable to ranged
weapon fire, not close combat.
P.S Control makes the selected unit fire so try to select
a unit that has fired or it cannot fire.