Things games should have, but don't

[Asther]

or as a pure gameplay mechanic, being able to save and load whenever you want takes a HUGE chunk of the risk or tension out of any game.
Imagine if Silent Hill let you save wherever you want, suddenly there's ZERO risk and it stops being scary.

Games can still keep this if they have a quicksave like in Pokemon Mystery Dungeon, where you could save to turn off the game (but not start over from there in-game), because sometimes you just have to quit playing immediately.