Warhammer 40,000: Dawn of War

Force Commander Gabriel Angelos:
While the enemies of the Emperor still draw breath there can be no peace.

Force Commander Gabriel Angelos:
Suffer not the alien, the mutant, the heretic.

Force Commander Gabriel Angelos:
He who stands with me shall be my brother.

Librarian:
Fear not the Psyker...

Librarian:
An open mind is like a fortress with its gates unbarred and unguarded.

Force Commander Gabriel Angelos:
The planet of Tartarus is ravaged. Its population has fled or died under the foot of the Ork. Its cities are smashed and burning. Its very ground is irrevocably tainted with the blood of aliens, traitors and cultists. There is nothing left... nothing but blasphemous heathens. And the mighty Space Marines who will destroy them.

Librarian Isador Akios:
Pathetic... You were great once, before doubt addled your will. Before you rendered judgment on Cyrene. Before you murdered the innocent and guilty, all in one stroke! You weak, sorry fool! How does it feel to have slain millions? To have betrayed you own family?

Librarian Isador Akios:
[Gabriel arrives to challenge his tainted comrade] You are a fool, Gabriel, you know you are no match for me.

Force Commander Gabriel Angelos:
Of all my brothers, why you? You were stronger than this!

Librarian Isador Akios:
I am stronger than you ever imagined. I can feel the universe tremble at my approach. Even the GODS know my name!

Force Commander Gabriel Angelos:
No one will remember you, traitor. I will see to that! [attacks]

Librarian Isador Akios:
[knocks Gabriel to the ground] Pathetic! You were great once before doubt addled your will. Before you rendered judgment on Cyrene. Before you murdered the innocent and guilty, all in one stroke! You weak, sorry fool! How does it feel to have slain millions, to have betrayed your own family?

Force Commander Gabriel Angelos:
I betrayed no one! [stands] Innocents die so that humanity may live. I ended their suffering, as I will end yours.

Librarian Isador Akios:
[after several blows, Isador is beaten and kneeling before Gabriel] You have beaten me. I cannot believe it. I was wrong, Gabriel, so wrong. I thought I was strong, strong enough to control it. I wanted to use the power for good, for the Imperium! You must see that! You must give me the chance to make amends! To seek redemption!

Force Commander Gabriel Angelos:
If redemption is what you seek, then that is what I will give you. [Shoots him in the head, as several marines come on to the scene] This is the fate of traitors. Remember this and do not stray. If you do I will be ready to render you the same service.