This site is for RPGs, games where a number of players get together and engage in a group activity that creates an emergent story (though the story may not necessarily be the focus of the activity).
CRPGs (computer RPGs) are not usually RPGs in that traditional sense. It is possible to play an RPG meeting this site's definition of RPG through the medium of a CRPG. Questions about the RPGing part of such an activity would be on-topic. However, questions about the video-gamey CRPG aspects would not be.
So, for example, if you run a MUD server to emulate a West Marches style campaign and modify the game as needed to interact with your players' exploration and you want to ask about, e.g. how to build suspense or deal with imbalance between characters in a party or whatever that would be on-topic. If your players wanted to ask what to do about their jerk server admin nerfing anyone who interferes with the plans of his GMPC, that would be also be on-topic.
However, if you wanted to ask about what mobs are located in such-and-such a region, or more generally speaking, if you wanted to ask any question not having to do with a hack of the game turning it into an RPG, those questions would be off-topic.