On the note of HPZ's background, I'm not sure where exactly he's said HPZ's background was not done by him. He's only ever said OOZ's background was not done by him. I decided to reach out to Craig Stitt about this, and ask him a few questions about the backgrounds as well as his working relationship with Yamaguchi (not to mention any names, but if anyone has a problem with this, know that we are friends on Facebook and had spoken before, and he's given full permission for this conversation to be published here). Spoiler: Q&A Craig's comments should be taken with a grain of salt considering he said he may have been shown things and simply doesn't remember. This was simply a job from 30 years ago after all. But regardless, the implications of this are clear: work on the zones I mentioned predates Yamaguchi's concept art, and so artwork of those zones (with the possible exception of Sand Shower) simply may not exist. It's also interesting that the zones this accounts for not only correspond to the Nick Arcade build, but they also represent one of each era during the time travel phase of development: Present: EHZ Ruined Present: OOZ Ancient: HTZ Future: CPZ Story: HPZ Probably a coincidence, but I wonder if it means something more. I should also mention he's told me about a developer journal he kept, and still has, that he believes would pinpoint the exact date of when he was told HPZ was cut from the game. He has not dug it out as of this writing, however.