Cheats and Hints

Cheats Codes Guides
Cheats, unlockables, hints, and glitches.
http://www.cheatscodesguides.com/xbox-cheats/halo-2/

Cheats.it
Cheat codes and hints.
http://xbox.cheats.it/Halo-2-Cheats.html

Halo 2 Glitches
Documents many of the superjumps and other glitches found in the game, with a video for each.
http://www.halo-2-glitches.com

Halo 2 Glitches and Tricks
Lists glitches and easter eggs. Includes skull locations and videos of multiplayer errors.
http://www.halo2-glitches.com/

Halo 2 Tactics
Offers forums, map guides and a glitch list.
http://www.freewebs.com/htactics/

Halo Tricksters
Videos of tricks and glitches.
http://freewebs.com/halotricksters/

Multiplayer Strategy Guide
Includes a walkthrough, screenshots and wallpapers to download.
http://www.freewebs.com/scypher-0/

Tricks and Glitches
Includes guides, forums, and a walkthrough.
http://www.freewebs.com/externible/