You are playing this great game over the course of four days, and have reached the penultimate level. Then you find the game has a bug which under certain conditions simply does not let you proceed to the last level no matter what you do. You'd like to move to the next level any which way - is there a cheat available?

Yes, Cheatbook Database 2009 (CDB) does precisely this, by providing cheats that can be entered into a game in order to obtain certain undocumented benefits. Those who played Doom on the 'Nightmare' skill level quickly found out that that typing IDDQD made them invincible, and typing IDKFA gave all weapons, ammo and armor.

These 'cheat codes' were particularly useful for those who have finished playing a game and want to relive the experience without spending quite as much time the second time around. Unskilled players might want to use cheats too, to simply have some quick fun in a game.

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Of course, multi-player games in which a number of people are playing against each other (or in teams) frown upon cheats since that gives an unfair advantage to the player that uses them, thus not rewarding skill. Cheats in gaming began as a method for game developers to quickly test and remove bugs in their product before shipping, so some games need to be started in "developer mode" for cheats. But game demos have no cheats.

CDB offers a wealth of such cheats, and where cheats are not possible, you can use walk-throughs instead that tell you how to quickly finish a game. It also contains cheats for console games, and you can insert new cheats that you find into the database. Monthly updates for CDB keep it fresh and worth referring to no matter which game you are playing.