"洞窟物語2:地獄の悪夢"...
"Doukutsu Monogatari 2: Jigoku no Akumu"...
"Cave Story 2: Hell's Nightmare"...
Okay, just something about that new name doesn't sound right to me. For one, it's not grammatically correct. In both English and Japanese. I'm aware the English title's been "Hell's Nightmare" for some time now, but that subtitle doesn't make sense because for one it's implying Hell is having a nightmare, in both languages, and Hell, being a location, can't have nightmares.
And please, please
Don't ride the "Japanese-title-because-Japanese-is-cool" concept, it's been done to death already and everyone's exhausted of it by now.
Also, also,
I feel as if you've slowly inched your way into also jumping into another bandwagon that many other modders jump onto, the "Cave Story 2" naming trope. I intentionally dropped the "Cave Story 2" from my mod's title because it's really overused, generic, and at times a really lazy way to try to get attention just because "sequel-oh-my-god-therefore-I-must-hype".
It would do your mod an exponential amount of good to change that title. Please.