That One Index

This index is for the single element in a game that stands out against all others as the single source of all player frustration.

Tropes in this index do not merely list frustrating elements in games: that's why it's "That ONE Index".

Tropes:

 * That One Achievement
 * That One Attack
 * That One Boss
 * That One Level
 * That One Rule
 * That One Player
 * That One Puzzle
 * That One Sidequest