Here’s a natural Japanese example sentence, followed by an English translation:
It sounds like you’re looking for a phrase or short passage beginning with (エロゲで…), likely as a prompt or example sentence.
"I think the most important thing in an eroge is the depth of the story and characters."
エロゲで一番大事なのは、ストーリーとキャラクターの深さだと思う。 (Eroge de ichiban daiji na no wa, sutōrī to kyarakutā no fukasa da to omou.)