Some brief descriptions of my experience with Xbox saves via Code Junkies , the Community or otherwise.

In no particular order;

Halo
( Haven't tried any Saves yet , since there is no cheats without a mod chip )
Halo GotYE
( I got 2 Xboxs ... LAN PARTY )
Dragon's Lair 3D
( This game is too damn hard , I'm usually frustrated to even look for something )
Kung Fu Chaos
( The Game is locked by the Game Developers , no cheats or saves without a Mod Chip )
Pirates - Legend of Black Kat
( Code Junkies Power Save is cool , but there is normal cheats for the game )
Slashdown
( Don't care to look )
Azurik -  Rise of the Perathia
( Nothing special here either , same as Pirates - Legend of Black Kat )
Oddworld - Munch's Oddysee
( Haven't looked , but this is a game I'd be ashamed to cheat on )
Dead or Alive 3
( The Game is locked by the Game Developers , no cheats or saves without a Mod Chip )
Jet Set Radio Future
( Haven't looked , beat the game & all extras before Action Replay came out )
RalliSport Challenge
( Used , Xbox-Saves.com saves , no cars where missing )
Gun Valkyrie
( I don't think if there was any cheats it would help you anyway , just the usual level unlocker save )
Star Wars Jedi Starfighter
( Worked like a champ , everything was unlocked , ditto for the community saves )
Burnout
( Beat the game before Action Replay came out )
Crazy Taxi 3 - High Roller
( Never looked )
Genma Onimusha
( Beat the game before Action Replay came out )
Gun Metal
( Nothing from Code Junkies , normal cheats available )
Buffy the Vampire Slayer
( Code Junkies save didn't work [at first] , but now everything is cool , and most Community saves are good )
Dead to Rights
( Just a level unlocker save )
Turok Evolution
( Built in cheats are generally all I needed , never looked )
Sega GT2002
( Never worked right [no cash either] , had to hit Xbox-Saves.com for player hacked saves )
Quantum Redshift
( Never Looked )
Robotech - Battlecry
( Level Unlockers , nothing else )
The Lord of the Rings - The Fellowship of the Ring
( More level unlockers )
Blinx - The Time Sweeper
( Uber money cheat ... but who gives a flying f*ck , I really need is infinite time clock )
Metal Gear Solid 2 - Substance
( Uh .... so many , I'm scared to even try ... still looking for the ultimate everything unlocked save )
Unreal Championship
( It's Xbox Live game , so nothing here )
MechAssault
( All levels unlocked , nothing special )
Splinter Cell
( Just a Level unlocker )
Ghost Recon
( Complete Dossier , works 100% , very happy )
007 - Nightfire
( Game have built in cheats , no save better than that )
Mortal Kombat - Deadly Alliance
( Everything Unlocked , good thing too , cause all the endings sucked )
The Lord of the Rings - The Two Towers
( Nothing , normal button mashing cheats are available  )
Dead or Alive Xtreme Beach Volleyball
( Nothing from Code Junkies , but some low tech hacks will give you everything )
Amped - Platinum
( Everything Unlocked , no complaints )
BloodRayne
( Games built in cheats are better than any save out there )
Air Force Delta Storm
( Nothing really cool , just the standard 20 planes or unlocked , best are at Xbox-Saves.com )
Panzor Dragoon - Orta
( Everything Unlocked .... time for some Panzor Dragoon 1 :)
Indiana Jones and the Emperor's Tomb
( All levels unlocked , nothing special )
Burnout 2 - Point of Impact
( I don't think there is any working on an un-modded xbox , due to the Xbox Live scores )
Brute Force
( Can only get levels unlocked , still need to play through the game for DNA , Datel no show here )
Midtown Madness 3
( FNG is my Hero .... a very badass save , everything unlocked  )
Enter the Matrix
( It comes with its own hacking program for cheats & secret materials .. what's the point ? )
Star Wars Knights of the Old Rebulic
( Datel did bang out a Light Side Ending save, but only sloppy hacks from Xbox-Saves.com are available )
Buffy the Vampire Slayer - Chaos Bleeds
( Community came through with a standard everything unlocked save )
Soul Calibur 2
( It's all community , best to look for them at Xbox-Saves.com )