Cheat Happens

Cheats for the PC, Playstation, PS2, X-box, Gamecube, GBC, GBA, N64 and Dreamcast.
http://www.cheathappens.com/

Cheat Monster

PC, GameBoy Advance, Playstation 2 and Xbox cheats.
http://www.cheatmonster.pwp.blueyonder.co.uk/

Cheats.IT

Cheats for most consoles including Xbox, Playstation and GameCube.
http://www.cheats.it/

Level 80

Contains cheats, hints, and tips.
http://www.level80.co.uk/

Active Gamer

Includes cheats for PC and console platforms including Playstation, Dreamcast and Nintendo 64.
http://www.activegamer.com/

CheatingPlanet

Offers cheats, codes and hints for PC, Playstation, Dreamcast, and other major consoles.
http://www.cheatingplanet.com/

Cheat Planet

Cheats and hints for most systems including PC, Xbox and Gamecube.
http://www.cheatplanet.com/

Super Cheats

Hints and cheats for most systems including PlayStation, GameCube, Xbox, PC and Macintosh.
http://www.supercheats.com/

GameFAQs

Cheats and hints for PC, GameCube, Xbox and other platforms. Cheats for many older platforms also.
http://www.gamefaqs.com/

Edge Cheats

Cheats and reviews for most of the consoles.
http://www.edgecheats.com/

Cheat Wizard

Provides a collection of cheats for various consoles.
http://www.cheatwizard.com

Computer Game Cheats

Provides cheats for a selection of PC, Dreamcast, N64, GameCube, PlayStation, and PlayStation 2 games. Also includes a mailing list, and forums.
http://www.computergamecheats.co.uk/

Cheats.ign.com

Offers a FAQ section, tips and tricks, and a buyers' guide on a variety of games.
http://cheats.ign.com/

Cheat Patch

Cheats for Dreamcast, Mac, PC, N64, PS2 and other sytems.
http://www.cheatpatch.com/

Cheats 2k

Hints and cheats for various game consoles.
http://www.cheats2k.net/

A+ Cheats

Video game codes, cheats, hints, and reviews.
http://www.apluscheats.com/