I don't know if the title is particularly clear- what I would like is to have an optional field in each game entry that allows the user to enter a name used only for sorting, so that I can, for example, put a series of games into what I consider the correct order (might not match other people's idea of correct). For example, I have a ton of the Sherlock Holmes adventure/mystery games. It would be nice if, without having to monkey with the real titles, I could give them sorting titles like "Sherlock Holmes 1: {First game's actual title}" and so on. Useful for gathering series that don't have similar titles, have inconsistent numbering setups, use Roman numerals, and so on.

Doesn't need to sync with the database, although in some cases it might be useful, such as with Ultima, which definitely has a numbered order for the games, but the numbering system is not applied consistently across the series, so they tend to come up in somewhat funky order in a simple alphabetized list. Maybe offer a default sort name for series like that, which the user can change without messing up the database? No need if that's too much of a pain.