I don't remember specifically in a game.. but on my profile I have a "bl isekai" list with a few suggestions, if it's helpful
https://www.mangago.zone/read-manga/reincarnated_into_demon_king_evelogia_s_world/ (game)
https://www.mangago.zone/read-manga/kiss_the_abyss/ (game)
https://www.mangago.zone/read-manga/the_honest_life_of_a_game_studio/ (game)
https://www.mangago.zone/read-manga/i_took_a_trip_to_an_otome_game/ (game)
https://www.mangago.zone/read-manga/to_be_or_not_to_be/ (novel)
https://www.mangago.zone/read-manga/straight_princess_in_the_royal_palace/ (game)
Not historical but try this https://www.mangago.zone/read-manga/dreadful_night/
I just read how to survive as a player and I’m dying for some more bl isekai. Anyone know any where the mc goes into a game or something?