These tropes explore infidelity, the forms it takes, and the effects that it has upon people. See also Netorare.

If a character or a team ever cheats in any sort of contest, they will end up coming last. In most cases, their cheating ways will explode spectacularly, ...

During the competition, it comes to light (for one reason or another) that the rival has been committing the most egregious of competitive sins: he's cheating.

The computer player is a cheating bastard whenever the "rules" differ between you and Video Game A.I.-controlled opponents. This can be a quick-and-dirty ...

Whether the cheating is a casual fling or a lover-stealer, people who have affairs usually won't take it well when they experience being cheated on themselves.

A Family Affair aka the cheater is cheating with another member of the cheated-upon character's family. The "mild" version tends to involve a cousin, sibling, ...

A character is wrongly accused of cheating on his spouse or girlfriend because of a series of misinterpreted clues.

Many video games have measures built in to punish the player for cheating (whether by built-in cheat codes or external cheating/hacking devices).

The Involuntary Cheating trope as used in popular culture. When it comes to success, many people would rather lose fairly than resort to cheating to win.

Not Cheating Unless You Get Caught · "Cheating seems to be a relevant term only when one is caught in the act. Otherwise it is viewed as intelligence, no?".