A few things qualify
1. Any time where you need extreme foreknowledge to avoid certain death in several parts of the game.
It is required that the death would happen even if the difficulty of the game was on the easiest setting possible. Games that qualify for this are like IWTBTG and a lot of games AVGN reviews .
2. Games that use AI to do things close to humanly impossible.
Fighting games are the biggest culprits here. While each game varies in scope, games like Soul Calibur (especially in 3 and 4) have AI that reads the buttons you push to react. So they can instantaneously counter your moves. Anti Ai movelists and strategies have been developed to counter this.
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Chrono1219