Originally Posted by Hindukönig
The tonics aren't something like stats, because you can change them anytime if you want. They are upgrades just like weapons, and you don't call a shooter an RPG just because you get stronger weapons, do you?
The "quests" are for storytelling only, just like every shooter has mission descriptions.
The inventory isn't anything more than that of other shooters.
The "deep" story of Bioshock isn't that deep (IMHO), and Jedi Knight offers choices, too, but nobody would call it an RPG.