 In the case of "Jet Set Willy" on the ZX Spectrum computer, a popular cheat involved replacing a Z80 instruction codice_2 in the program (which was responsible for decrementing the number of lives by one) with a codice_3, effectively granting the player infinite lives.On Microsoft Windows, a common type of video game hacking is through the use of DLLs.Users use a third party program to inject the DLL into their game of choice.