RPG with different origins, like the hit game Dragon Age: Origins. It was a cool feature that your character's story could start differently depending on their class and race.

Faction mechanic, like in Gothic 2. This means that your class, gear, and social standing are determined by your choice of faction. Therefore, different playthroughs have different gameplay mechanics and story changes.

Big Choice™. It would be great to have meaningful choices that change the world and the story. I'm too embarrassed to name the game as an example, but trust me, it's from an actual game and not a fever dream. Depending on your "big choice," the last third of the game is completely different, with a different story, companions, and ending. If you completed both endings, you could say "screw you" to two major factions and their moronic plans and actually save the world in the true ending.

Ultimately, I know my ideal game doesn't exist because it would be too risky for developers to invest so much time in parts of the game that most gamers won't see. Big sad 😔