I don't think we need a tag for this. We have play-by-chat, online-roleplaying, and indeed roleplaying itself. (I've suggested an alternative name for if we do keep the tag, but this post should be considered support for removing it altogether.)
If video game roleplaying is on topic because it's not distinguishable from play-by-chat, then distinguishing it via tag is a bit of a contradiction. We don't make such a distinction for other platforms for playing by chatting.*
Putting it another way: are we expecting to have video-game-roleplaying experts now? No, we aren't! And a singular tag for them to be experts in would be absurd anyway: no-one can be expert in that tag because the scope of video games is ridiculously large. Expertise in roleplaying within one video game can't translate to expertise in roleplaying within a different video game… unless the video game itself is irrelevant, in which case so is the tag. For the same reason that we have system tags, we would need specific-video-game tags, which development would make it obvious how off topic the whole thing is.
As a secondary problem, it will likely encourage people to misinterpret the tag and submit questions about CRPGs.
* Though we do have, e.g., roll20, that's because questions specific to that software's features are on-topic by its own merits, like anydice's relationship to statistics, or both to tools.