Glitch

A glitch is technological "mistake" or sorts that can alter gameplay. Many glitches are harmful, such as freezing the game, erasing save files, or causing a level to be unplayable. Not all glitches are harmful, though. Many can be utilized to improve gameplay and ever worked into strategies. Glitches can allow item use when it is not normally possible, entry into unfinished level zones, or even cheating to finish games better or faster.