It is true that game design should want the player to continue playing the game. But not adding clean means of exit or hard to reach "quit" buttons, is not the way to do it. Such a design will force the player to hard quit denying the feeling of closure to the game experience. The player might get frustrated, especially if the game is being quit due to some real world emergency.
Metal Gear
This is a series of action-adventure stealth video games, created by Hideo Kojima and developed and published by Konami. Although, the game design worked for the initial versions, change in players' demands over time, necessitated a clean and quick exit button. This means that players want to exit right from the controller and not go to the keyboard for this one action. When such an option was not found, players resolved to spamming online forums about advice for quitting or worse completely dissing the game because of this one flaw.
