It's a butchered port, but because it's Castlevania + Konami + on the SNES + uncommon ... the price tag is what it is.
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To-do manuals: Arabian Knights, Gulliver Boy, Dark Law, Brandish 2, Flying Hero
Finished manuals: Neugier, Wonder Project J, Burning Heroes, Star Ocean, FEDA, Monstania, Chaos Seed