Mark of Kri, The

ConsoleCheatCodes - http://www.consolecheatcodes.com/playstation2/markofkricheats.html
Provides cheats, hints, tricks, and codes.

Realm of Gaming - http://www.realmofgaming.com/?page=ps2cheats/themarkofkri.php&type=cheats
Contains cheats and codes for the game.

The Mark of Kri - http://www.us.playstation.com/mCurtain.aspx?id=4&ref=/Content/games/SCUS-97201/ogs
Sony's official site. Features weapons, mini-games, character information and background story.