WWE SmackDown! vs. RAW 2008 Codes -

Cheat Mode
The following CASE-SENSITIVE codes should be entered under the options menu:

KellyKG12R - Unlock Kelly Kelly alternate outfit
DXCostume69K2 - Unlock HHH & HBK alternate D-X outfits

Achievements
Complete each achievement to get the allotted gamerscore:

That's Gonna Leave A Mark (20 points) - Powerbomb an opponent on top of a steel step in any match type.
Possession is 9/10 Of The Law (20 points) - Steal your opponent's taunt 3 times in any One on One match.
Put'em In A Body Bag (20 points) - Turn your opponent's entire limb damage meter red in any match type.
I'd Like To Thank The Academy (20 points) - Defeat a Powerhouse Superstar with the Possum Pin in any match type.
You've Got A Bit Of Red On You (20 points) - Get busted open by your opponent on legend difficulty in any match type and win.
Who Says Originality Is Dead (20 points) - Create an original CAS, ring entrance and created Championship.
King Of The Mountain (20 points) - Place first in every type of tournament in Tournament mode.
If It Bleeds... (20 points) - Bloody every ECW Superstar on the roster.
Submission-Sensei (50 points) - Win a Normal Submission match without having your Struggle Submission hold broken once.
Stop Yapping And Fight (20 points) - Argue with the referee 4 times in a match and win.
That's One For The Record Books (20 points) - Eliminate 20 opponents in a 30-Man Royal Rumble.
Now That's Hardcore (20 points) - Bloody and defeat a Hardcore Superstar on legend difficulty in an ECW Extreme Rules match and win.
The Best There Was... (20 points) - Win a 20-minute Ironman match on legend difficulty without surrendering a point to your opponent.
A Fighting Champion (75 points) - In ranked online matches, defend a CAC title 5 times against 5 different players within 24 hours.
Gold Digger (70 points) - Win a Created Championship 10 times in ranked online matches.
On Fire (75 points) - Win 30 consecutive ranked online matches.

Additionally there are ten secret achievements:

Escape Artist (20 points) - Wiggle free from every Ultimate Control Grapple at least once.
What The... (10 points) - Preview the Mexican Stretch Turnbuckle move in Create a Moveset.
You've Got Guts (20 points) - Complete a ranked online title match.
Send'em Back To Louisville (10 points) - Lose to an opponent who has more limb damage than you.
Now Offering Non-Stop Flights (20 points) - Stand on a ladder and suplex your opponent out of the ring in a ladder match.
Rope A Dope (20 points) - Perform a succesful springboard attack off each side of the ropes.
This Year's Inductee (350 points) - Play as a GM in 24/7 Mode and obtain the GM of the Year Award.
On The Job (10 points) - Lose 5 consecutive ranked online matches.
Better Luck Next Year (10 points) - Be the first Superstar eliminated in a 30-Man Royal Rumble.
This Is Coming Out Of Your Check (20 points) - Break 15 tables and 10 chairs in a TLC match.

Unlockables in Main Event Mode
Do the following things in main event mode to unlock extra outfits and characters:

Triple H DX outfit - Get to Main Event status as Triple H
Vince McMahon bald head - Win the ECW world championship

Unlock Characters
Unlock characters by getting the indicated ranking:

JBL - Gain Main Eventer ranking in Main Event mode for the SmackDown brand.
Shane McMahon - Gain Main Eventer ranking in Main Event mode for the Raw brand.
Vince McMahon - Gain Main Eventer ranking in Main Event mode for the ECW brand.