RSV2 is commonly used to search for Rainbow Six Vegas 2.
No one has used either tag before, so someone removed RSv2 tag and recommended I post on meta to synonomize the two (whatever that means).
Actually, the proper course of action is to propose a synonym:
https://gaming.stackexchange.com/tags/rainbow-6-vegas-2/synonyms
But anyway, I just went ahead and added the synonym.