WrongSprite said:
I can't actually think of any games which mix gun and crossbow. I don't play those kind of games...
Half-Life?
Half-Life 2?
Deus Ex?
Bioshock?
Those all more or less make sense in context, too.
Half-Life's crossbow was intended to deliver tranquilisers, though they're effective enough to make a good weapon, too.
In Half-Life 2 it's the closest thing the human resistance can get to a sniper rifle with what the can get thier hands on.
Deus Ex uses the crossbow for stealth or non-lethal purposes; the normal bolts are good for silent kills, the tranquilisers are good for people who want to make a non-lethal run, and the flare bolts are good for making distractions; again, good for stealth characters.
Bioshock is a little harder to justify, though Trap Bolts are something that would make even less sense in bullet form... I guess this is the one that falls under 'just don't think about it too much'.