I want my wife to play this game with me. But I think that she won't play very long with me due to lack of ammo. What's the fastest way for me to unlock this so I can get her to play the story? Thank you.
the only skills i bought in the campaign were increased item drop, defense lvl3, and firepower lvl1. Other than that I just saved all my skill points and was able to buy the unlimited ammo without playing mercenaries for the shotgun and magnum which is really all you need to easily beat the game on pro.
If you find yourself needing to grind a little more skill points then play mercenaries, it really is the quickest way to get points. Ammo is actually plentiful in mercenaries if you have a decent idea of what your doing so your wife might enjoy playing it with you which makes it much easier.
The only thing really difficult about mercenaries is finding a competent partner, some of these guys on xbox live make me want to pull out my hair.