Various cheats

     While  in  the detachment selection screen, hold down the control
key and type Paladin. This enables you to use Knight Paladin units.

     During the battle, hold down the control key and type:

Cheat code:             Effect:
EYEOFTERROR             To be able to see all enemy units.
HERETIC                 Completes the mission.
CLEANSINGFIRE           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.