A computer game is a computer-controlled game that players may interact with. A video game is a computer game where a video display such as a monitor or television is the primary feedback device. These terms are not always interchangeable as some games, particularly older games, do not use a video display.

Cheating in online computer games is a broad category of activities, all of which are generally regarded as modifying the game experience in a way that gives a player an unfair advantage over the other players. Depending on the game, different activities constitute cheating, as it is often a matter of consensus opinion.