What is the best practice for completing the 'Platform' field in the 'Game details' box in the case of games (directly) ported to additional platforms as a part of a compilation?
Take Sonic R as an example. It currently has Saturn and PC listed in the 'Platform' field. It was ported to Gamecube and PS2 as a part of the Sonic Gems Collection, but was not released for either platform as a standalone game. There was no remastering—it was a direct port. In this instance, can we add Gamecube and PS2 in the 'Platform' field for Sonic R?
The Wiki Rules do not mention this matter directly—the closest thing is the case of what counts as a game in itself (rather than a release) in the case of compilations:
This [i.e. an edition being a release rather than a separate game] includes compilations of games which may feature several other games long with the title in question. There are specific exceptions to the rule with games that come bundled as one package and appear on a certain platform by only that means (such as The Orange Box), but generally these are all releases.
This does not address my query, unless it implies (or assumes an understanding) that anything that is considered a game in itself (e.g. Sonic Gems Collection) cannot be considered a release of another game (e.g. of Sonic R). That would seem unnecessarily restrictive to me, but I'd like to check before I make erroneous edits.