「悪魔城ドラキュラ 闇の呪印」が元となっています (Pachislot Akumajo Dracula is based on Curse of Darkness). ラルフ側から見たもうひとつの物語が、 パチスロ版の悪魔城ドラキュラI・Ⅱのストーリーとなっています (Pachislot Akumajo Dracula I&II story is a "gaiden" from Ralph's perspective.)
The way the word "gaiden" is used suggest that it means "alternate timeline".
It actually says "another story" (もうひとつの物語 / Katakana: アナザーストーリー) which is a synonym of gaiden. "another story" is a loan word of sorts from English but I don't think the term is actually used in the west. The "another" part refers to a story taking place in "another world" i.e an alternate universe.
Yes indeed you're right. The problem was that the translation of the blog page was so broken and incorrect. So I basically couldn't understand much from that. Thank you.
This happened when i wanted add the category (Mirror of fate character) at the page of Necromancer(Lords of shadow), please, could you tell me how to eliminate the categroy Mirror o?