Cheating in video games involves a video game player using non-standard methods to create an advantage or disadvantage beyond normal gameplay, in order to make the game easier or harder. Cheats may be activated from within the game itself (a cheat code implemented by the original game developers), or created by third-party software (a game trainer) or hardware (a cheat cartridge). They can also be realised by exploiting software bugs; this may or may not be considered cheating based on whether the bug is considered common knowledge. Software bugs are very often considered software features and as long as they are common knowledge, it is questionable whether it is cheating.