Do the following task to unlock the following achievements and their alloted gamerscore.

A Fighting Online Champion (60) Defend your created Championship 20 times online.

Certified Online Superstar (70) Win 50 consecutive online matches.
Championship Gold! (30) Unlock every WWE Championship title.
Complete Domination! (20) Defeat every Superstar on the roster at least once on legend difficulty.
Crown Us The Champ! (10) Create a Tag Team Championship in Create-A-Championship mode.
Curtain Call (5) Create an original entrance in Create-An-Entrance mode.

Employee of the year (100) Win the General Manager of the year trophy.

In Ring Journeyman (10) Win at least one match using every Superstar on the roster on any difficulty setting.
In Ring Technician (10) Defeat every Superstar on the roster by pin or submission at least once on hard difficulty.

Let It Reign! (100) Defend your created Championship 50 times online.
Let The Creative Juices Flow (5) Create one original Superstar using the Create-A-Superstar mode.

Mr. PPV (5) Create an original PPV event in Create-A-PPV mode.

New Hire (50) Complete one full year of General Manager Mode.

Online Blue Chipper (40) Win 20 consecutive online matches.
Online Rising Star (20) Win 20 matches online.
Online Veteran (30) Win 50 matches online.

Royal Rumble Jobber (20) Win a 15 Man Exhibition Royal Rumble as the # 1 entrant on any difficulty.
Royal Rumble Legend (20) Win a 30 Man Exhibition Royal Rumble as the #1 entrant on legend difficulty.
Royal Rumble Pro (20) Win a 25 Man Exhibition Royal Rumble as the #1 entrant on hard difficulty.
Royal Rumble Rookie (10) Win a 10 Man Exhibition Royal Rumble as the # 1 entrant on any difficulty setting.
Royal Rumble Veteran (20) Win a 20 Man Exhibition Royal Rumble as the # 1 entrant on hard difficulty.

Season Mode Jobber (50) Complete Season Mode on easy or normal difficulty.
Season Mode Legend (100) Complete Season Mode on legend difficulty.
Season Mode Veteran (100) Complete Season Mode on hard difficulty.
Seasoned Vet (50) Win 100 matches on any difficulty setting.
Self Anointed Champion (10) Create a singles Championship in Create-A-Championship mode.

Those Who Paved The Way (20) Unlock every WWE Legend.

Way Past Jobber (20) Win 50 matches on any difficulty setting.
With Friends Like These...(5) Create an original stable of Superstars in Create-A-Stable mode.

Unlockables :-

Arenas

Backlash Arena Win the Backlash Trophy in Season Mode
ECW One Night Stand Arena Win Money in the Bank Ladder Match on Legend Difficulty
No Mercy Arena Win the No Mercy Trophy in Season Mode
Saturday Night Main Event Arena Win the Superstar Challenge Trophy
SummerSlam Arena Win the SummerSlam Trophy in Season Mode
Unforgiven Arena Win the Unforgiven Trophy in Season Mode
Vengeance Arena Win the Vengeance Trophy in Season Mode
WrestleMania 22 Arena Win the WrestleMania Trophy in Season Mode

Legend Championships

Million Dollar Championship Complete The Legend Challenges
n.W.o. Championship Unlock it by winning the SummerSlam Trophy and then you can buy it in the shop.
Smoking Skull Championship Unlock it by winning the Royal Rumble Trophy and then you can buy it in the shop.
The Hardcore Championship Belt Win the Superstar Challenge Trophy

Locker Room Shop Unlockables - Banners

Bret Hart Banner Unlock by winning the Survivor Series Trophy.
Candice Banner Unlock by winning the No Mercy Trophy.
D-X Banner Unlock by winning the Vengeance Trophy.
Hulk Hogan Banner Unlock by winning the Wrestlemania Trophy.
Lita Banner Unlock by winning the No Mercy Trophy.
Melina Banner Unlock by winning the No Mercy Trophy.
Mickie Banner Unlock by winning the No Mercy Trophy.
Stone Cold Banner Unlock by winning the Royal Rumble Trophy.
The Rock Banner Unlock by winning the Wrestlemania Trophy.
Torrie Wilson Banner Unlock by winning the No Mercy Trophy.
Trish Banner Unlock by winning the No Mercy Trophy.

Locker Room Shop Unlockables - Collectibles

Chloe Unlock by winning the No Mercy Trophy.
D-X Figure Unlock by winning the Vengeance Trophy.
Edge and Lita Figure Unlock by winning the Legend Challenge Trophy.
King's Crown Unlock by winning the No Way Out Trophy.
Rock vs. Hogan Figure Unlock by winning the Wrestlemania Trophy.
RVD's Money in the Bank Unlock by winning the Money in the Bank Trophy.
Steveweiser Unlock by winning the Royal Rumble Trophy.

Locker Room Shop Unlockables - Decorations

Candice Cut-Out Unlock by winning the No Mercy Trophy
Diva Clock Unlock by winning the No Mercy Trophy
Hogan Trashcan Unlock by winning the Wrestlemania Trophy.
Hogan's hanging boas Unlock by winning the Wrestlemania Trophy.
Mickie Cut-Out Unlock by winning the No Mercy Trophy.
Shane O'Mac Jersey Unlock by winning the Armageddon Trophy.
Torrie Cut-Out Unlock by winning the No Mercy Trophy.
Trish Cut-Out Unlock by winning the No Mercy Trophy.

Locker Room Shop Unlockables - Furniture

Chris Masters Statue Unlock by winning the Backlash Trophy
Pink Furry Couch Unlock by winning the No Mercy Trophy.
Trucker Girl Rug Unlock by winning the No Mercy Trophy.

Locker Room Shop Unlockables - Posters

Bret Hart Unlock by winning the Survivor Series Trophy.
Cactus Jack Unlock by winning the SummerSlam Trophy.
Candice Poster 1 Unlock by winning the No Mercy Trophy.
Candice Poster 2 Unlock by winning the No Mercy Trophy.
D-X Poster Unlock by winning the Vengeance Trophy.
HulkMania Poster Unlock by winning the WrestlemaniaTrophy.
Jillian Poster Unlock by winning the No Mercy Trophy.
Lita Poster 1 Unlock by winning the No Mercy Trophy.
Lita Poster 2 Unlock by winning the No Mercy Trophy.
Mankind Unlock by winning the SummerSlam Trophy.
Melina Poster Unlock by winning the No Mercy Trophy.
Melina Splits Poster Unlock by winning the No Mercy Trophy.
Mickie James Poster 1 Unlock by winning the No Mercy Trophy.
Mickie James Poster 2 Unlock by winning the No Mercy Trophy.
Stone Cold 1 Unlock by winning the Royal Rumble Trophy.
Stone Cold 2 Unlock by winning the Royal Rumble Trophy.
The Rock Unlock by winning the WrestlemaniaTrophy.
Torrie Poster 1 Unlock by winning the No Mercy Trophy.
Torrie Poster 2 Unlock by winning the No Mercy Trophy.
Trish Poster 1 Unlock by winning the No Mercy Trophy.
Trish Poster 2 Unlock by winning the No Mercy Trophy.

Other Unlockables

Divas Loading Screen Win the No Mercy Trophy
DX tag entrance Win the Vengeance Trophy
WWE Legends Loading Screens Complete the Legend Challange Mode

Unlimited CAW EXP Points

Unlimited CAW EXP Points Become GM Of The Year In GM Mode

WWE Legends - Win the following trophies to make the legends buyable in the shop.

Bam Bam Bigelow Win the Unforgiven Trophy
Bret Hart Win the Survivor Series Trophy
Cactus Jack Win the SummerSlam Trophy
Dude Love Win the SummerSlam Trophy
Hulk Hogan Win the WrestleMania Trophy
Jerry "the King" Lawler Win the No Way Out Trophy
Mankind Win the SummerSlam Trophy
Mr. Perfect Win the Backlash Trophy
Shane McMahon Win the Armageddon Trophy
Stone Cold Steve Austin Win the the Royal Rumble Trophy
Tazz Win the No Way Out Trophy
The Anvil Jim Neidhart Win the Survivor Series Trophy
The Rock Win the WrestleMania Trophy