Which close reason, if any, do we want to replace?
Game identification: 2.03% of total and Recommendations: 3.47% of total
I think it would be relatively simple to put these off topic reasons together, asking for a game that is about 10 years old where you play as a goat could either be game identification, or a recommendation, depending on the rest of the question. They are fairly similar and would probably work well together. We could rename this new close reason to Game identification and Recommendations.
Questions asking for recommendations of games, servers, software, or hardware, or to identify these based solely on memory are off topic. If you have a picture, video, audio file, or other medium to point to, we can help identifiying the game. See our Game Identification Wiki, our curated list of external resources, or "Q&A is Hard, Let’s Go Shopping!" for more info and help.
Game design and development: 1.35% of total
This makes sense as an "official" off topic reason, I don't think that we can combine it with any of the other three off topic reasons in a way that makes sense. I'm not completely sure what kind of questions we usually get for this, but it may be possible to close these question as off topic, because they belong on another site in the Stack Exchange network instead.
Unreleased or illegal: 0.58% of total:
Edit: We could replace this off topic reason due to the low rate of usage and some other things.
This is an important close reason in my opinion. It should not be removed, even though it isn't used much. This would basically show that we do not want to help with illegal activities. I personally don't consider questions about unreleased games to be quite as bad. It might make more sense to combine questions about unreleased games with the "Game design and development" off topic reason.
This should stay as it's own close reason
What should the wording of the new close reason be?
We have a highly specific rule that singles out a single game.
I believe that this is, in general, the most common complaint about this reason to close a question. I may be wrong, but it's certainly an important problem.
The problem is not that these questions are about minecraft, the problem is the general lack of quality and the difficulty to troubleshoot the problem, if it's even possible to recreate it. We will have similar problems for any other popular game that is highly moddable.
I would suggest that we change the wording to "non vanilla versions of highly moddable games" instead of "modded minecraft". This would mostly affect minecraft, but it wouldn't single out one game, it would be a general rule that would account for all questions that would suffer from the same problems.
I basically think that we should have "Troubleshooting and diagnosis of non vanilla versions of highly moddable games, including crashes, startup errors or other abnormal behaviour caused by modding" as the reason why we close a given question.
This would work well as an off topic reason:
Questions that ask for troubleshooting and diagnosis of non vanilla versions of highly moddable games, including crashes, startup errors or other abnormal behaviour caused by modding are off topic.
It would also work as a custom close reason:
I'm voting to close this question as off topic because it is about troubleshooting and diagnosis of a non vanilla version of a highly moddable game, including crashes, startup errors or other abnormal behaviour caused by modding.
If we decide to add it to the off topic reasons, then combining game recommendations and identification may be a good way to do this. Alternatively it may be possible to remove "Game design and development" from the off topic list, but I consider this alternative to be worse. We wouldn't nessessarily have to add it, but it would make sense.
Edit: We can also replace the off topic reason for questions for Unreleased or illegal things.
I think that we should reword the close reason to not be about a single game, while keeping it narrow enough to only be valid for games that are likely to cause the same problems.