They are technically software, not games nor accessories. Accessory typically means that it is hardware related, but unfortunately we do not track software. So you'll find many other instances of this, particularly with any other Console based software that is in a game category. Such as Photo CD Operator for Saturn or BASIC for Atari 2600.
This is a situation similar to multi-branded accessories where there is no rule on the site to say where they should go, with the exception that category types have precedence over everything else. This only effects reports but we would like them to be accurate, but we already know there are many items marked as Games that are not games, such as the above examples.
We've had some interest in creating categories for software but it has never been approved by whoever makes the decisions at the top over the years. This is primarily tied to Computers, of which we only track games and not any software, even if it was released on a cartridge unless it could be conceivable considered to be an Accessory.
