Doki Doki Mario 64

Doki Doki Mario 64 is a ROM hack created by Kaze Emanuar. This game is named after Doki Doki Literature Club, another well-known dating sim that subverts some expectations of the genre.

This hack is a parody of dating sims where Mario joins a high school and is able to choose from 12 different potential love interests to run quests for.
The game is unique in that Stars can be collected as often as the player wants from the Star Fields, being treated more as a way to progress each girl’s routes or as currency to buy special items rather than an end-of-objective reward. There is very little combat in this game, and Mario cannot die or even take damage. Despite the game’s nature as a meme, there is an actual story that progresses as you play the game, requiring the player to do each girl’s route at least once before seeing the true ending.