Good Karma (if the player makes the Tunnel Snakes stop bullying Amata) killing Vance and The Family in Blood Ties). Most of the quests in Fallout 3 either involve or can be completed with a combat situation (e.g.
Unmarked quests do not provide achievements/trophies. Every quest that appears in your Pip-Boy grants an achievement (on the Xbox 360 and PC) or a trophy (on the PlayStation 3) upon completion in base game only.
