Sandbox MMORPGs are unusually messy to catalogue because their most important qualities rarely fit into one official genre field.
A store page may call a game an MMORPG, survival game, crafting game or open-world RPG without explaining whether players can own land, lose equipment, reshape terrain, run markets or conquer settlements.
Status is another problem. Small sandbox MMOs frequently move through alpha tests, relaunches, publisher changes, long quiet periods and community revivals. A page written two years ago can easily describe a game that no longer exists in that form.
Then there are edge cases. Is a game with one lethal region a full-loot MMO? Does predefined guild territory count as a player city? Those are classification questions rather than simple facts.
Our solution is to keep broad database tags separate from implementation details. Tags make the site searchable, while profiles and feature pages explain what those tags actually mean. When information is unclear, uncertain is more useful than pretending every database row is equally authoritative.