If the game is half bad I may use one. In other words, if it is poorly laid out or explained, but stll has some good bits, and I want to but can’t complete it, then I’ll use one.
Also, If I’m playing an MMORPG, I may use guides to locate things, on some online games it’s almost impossible to get by without looking things up. You could spend 4 or 5 hours searching if all you had to go on was the info in the game.