I'd buy those games

Forgetting how to play a game and forgetting what all happened in the story is the main reason I don't finish games. Sometime's I'll just restart the game if I wasn't too far in but most of the time, ehh.

Elite Dangerous has this! You can enable "Pre-Flight Checks" which gives you a rundown of all controls (forward, back, fire, deploy gear, etc.) whenever you take off.

FF14 has that. You log in and it'll 1) try and link you to an encyclopedia, 2) show previous quests and quests near completion 3) show potential achievements. I've never turned off the quest list, but I imagine if you did it would pop up as a reminder until you turn that off.