At present, if a game is not contained within the [limited] Gamespot database, users are unable to add it to Stacks.
Personally, I'd appreciate the ability to share a catalogue of some of the [many] games which fall outside of the scope of the mainstream industry, and oftentimes the purview of this site.
Alternatively, please grant us the facility to submit game titles for inclusion in the database.
BTW, I originally had a "please" in the Topic line, but the 60-character restriction forced me to exclude it. :|