Cheating to win a game is a shameful act because it goes against fairness and honesty. Any shameful act can leave you feeling guilty and embarrassed if you get caught — as it should.
The word shameful describes actions or behaviors that are disgraceful. For example, cheating on a test or telling a hurtful lie are shameful acts because they betray the values of trustworthiness, honesty, and kindness. When someone does something shameful, they are held in a state of dishonor, leading to feelings of regret and a desire to try and make things right.