All three questions with the octodad tag appear to be about the newly-released sequel, Octodad: Dadliest Catch, and not about the original game that came about as a school project. Even the tag wiki describes Dadliest Catch.
Whether or not anybody (other than the user who made the tag) actually refers to Dadliest Catch without the subtitle, I think the tag as it is currently used should be renamed to octodad-dadliest-catch so that octodad can be used for questions about the original game should any such questions surface in the future.
I can retag the questions myself easily1, but what about the tag wiki: do I simply create the wiki for the new tag name and paste the content there? Do I need to rewrite the wiki for the original game tag, or would doing that now be futile once the tag is no longer used on any questions (e.g. would the wiki be orphaned, or deleted entirely, etc)?
1 In fact, I did do just that, but realized the wiki wouldn't be migrated over so I rolled it back first to preserve the wiki.