Walkthroughs are typically found in single player or coop games. It doesn't matter if it's cheating or not, because it doesn't affect other people. You are only 'cheating' yourself. It does only matter in competitive multiplayer games.
edit: After reading some of the other posts I realized that I just don't take gaming as seriously as other gamers (maybe that's what divides players into casuals and hardcore - I'm clearly casual).
What I do take more seriously is the competition with other people, and there I dislike cheating. But gathering information (like reading about strategies) even then I don't think is cheating. Learning strategies about poker isn't cheating. Pulling a card out of your sleeve is.







