[skoczymroczny]

without any bug exploiting, you can use killphrases on anne and run away from gunther (or use killphrase too). I think Howard Strong is the only guy you have to actually kill.

[Paul_S]

Technically you also kill (indirectly) the crew of the ship you scuttle, Maggie, the Area 51 staff who are outside when you diverted the missile etc.