Christian RPG? Is that even possible? A tbt story driven Christian game where you are trying to get as many as possible to follow Jesus Christ? Funny it hasn’t seem to be done as biblically, Super Bookish, etc as possible. Technically, if not rushed it could be a serial rpg of sorts from even before the Garden to the very end. It’d have to take a few creative liberties though if a party goes through the entire thing. But this would be rushed trash more than likely as feathers would be ruffled etc. and then other religions might want their episodic game as well.
Turbo based idea, but I am thinking if you are going to want to make a Christian/Catholic-appealing video game, you go full Catholic mysticism in the middle ages. So my dream game if I make it ever will be like a classic (maybe open world or open field) action-adventure type game (MAYBE RPG, unsure) where you are a knight learning about and gaining virtues. It actually would be similar to Ultima. You would fight demons and figures from European folklore (chimaera) because it would be in the middle ages. And the game would subtly teach about the Church's view of virtues through fantastic combat, battles, dialogues, and character interactions (NOT in a fruitcake modern-gaming way though). In this game there is no character choice to be an edgy tryhard. You are explicitly learning how to be a paladin basically, because morality is concrete and not relative despite what the communists who have infiltrated this country would have you believe (and the free masons). The game WOULD deal with choice and consequence and moral nuance, but murder hobo-ing is not allowed. It would be an exploration from our limited human gaze of "what is the ideal/best moral way to treat this given scenario?" And explore what it really means to be a knight in title and deed. Very heavily Arthurian as well. Very medieval European aesthetic, proudly. Maidens to rescue or ignore for their salaciousness, etc (or maybe you rescue them any way but then give them the boot for suggesting things unholy). And based on your choices you may invite demonic influences toward you. I have a lot of ideas. But the base thing is teaching Aquinas through actually enjoyable, engaging "normal" video gamery with combat against knights, creatures, demons, exploring sprawling levels, taking on quests...Etc. All in C++. Maybe. But the combat must be action-based so normies play it and learn about virtue without realizing it, so they think twice before hooking up with a clueless woman in college and spread AIDS or kill a baby and then vote Democrat so they don't have to face their own moral failures.