I suggest a mass update for Doom franchise tag; the Doom (game) tag refers to the first 1993 game but is currently used as an umbrella tag for the other tagged games in the franchise (Doom II, Doom 64, Doom 3, Doom (2016), Doom Eternal, and also Doom (comic)):
- mass update Doom (game) to Doom (series)
- Implicate Doom (2016) and Doom Eternal to Doom (series)
In the search "doom_(game) -doom_ii -doom_3 -doom_64 -doom_(2016) -doom_eternal -doom_(comic)", there are mostly posts for the series in general, the few ones referencing the first Doom game are parody of the iconic cover (ex: post #3278094).
My only doubt is the tag name for the first Doom game, should it be named Doom I? Wikipedia named it as Doom (1993), doesn't seem like a bad tag name at all imo.
Updated