Audience’s Rights Reform #13: No permanently missable content
Permanently missable content enrages players and diminishes the overall experience. Games should respect players’ time and provide ways to revisit or recover missed content.
Example A: The Pokémon main series games
The quintessential example, of course, is the legendaries in the pre-Platinum Pokémon games. The ideal solution is to patch said games so the legendaries respawn if not caught, like in the later ones. In fact, there is at least one Red hack that has already done this (Red TPP).
Pokémon Ruby and Sapphire should also be patched so that the Master Ball is not permanently missable. This may mean omitting the seal on Team Aqua/Magma’s hideout, or adding an alternative location for the iconic item to appear only if it is not collected in the hideout.
Example B: Super Mario RPG
There are only two opportunities in the game to obtain the hidden treasure chest in Princess Peach’s castle. Either the chest should be moved to a non-missable location, or a staircase leading up to it should be added (maybe a staircase that only appears late in the game).
Example C: Pokémon GO
All limited-time Pokémon should have to be re-released after a certain amount of time, for the benefit of new and inactive players. (In particular, one of my friends regrets not buying the ticket for the Keldeo event.) Or at the very least, all Pokémon including mythicals should be made tradeable.