Well, that depends. In the series "RPG Round Table" (was it at IGN ? Don't remember) an developer of a company actually had the popinion that *basically* everything where you play the role of someone actually *is* an "role playing game" - even an First Person Shooter !
However, I am thinking that A) he is *basically* right, but b) an First Person Shooter *doesn*t fit into the genre of RPGs, simply becvause it doesn't have any of the "features" an RPG has - like experience points, rule-set, hero upgrading and so on.
When you find a big kettle of crazy, it's best not to stir it. --Dilbert cartoon
"Interplay.some zombiefied unlife thing going on there" - skavenhorde at RPGWatch