Some examples by what I mean are illusion of Gaia and Super Mario RPG for the SNES. Both have a skippable items at the very beginning of the game, and unless you read a guide before playing, you must start a brand new game for that one last thing.
Grand Theft Auto games, as well as others not telling you what Collectibles you have found and not found. Compared to the Batman Arkham games that indicate what is left.
Should we also include bugs? Like a bug in Lego Harry Potter the kept you from getting one single gold brick unless you started a new save ( hopefully this was patched). Or the bug in Crackdown that kept you permanently at 499 out of 500 orbs unless you started a new game.
Then we have the typical Japanese game where you have to push button forever for 100% completion. Mario RPG super jump Secret, Final Fantasy 10 dodging lightning, Mario Odyssey 100 jump ropes. I think of these as Desert Bus rewards.
I find it amusing one of the top downloads in Skyrim is just a …