Activate the following cheats by entering the corresponding codes at "My 2010 FIFA World Cup" > "EA Sports Extras" > "Unlockable Code Entry":

CHEAT FUNCTION - CHEAT CODE
Adidas Ultimate 11 and Classic 11 teams - WSBJPJYODFYQIIGK
Running With The Baby celebration - UGSIMLBHLFPUBFJY
Speed Skating celebration - LHEHJZTPYYQDJQXB
The Prancing Bird celebration - TWVBIXYACAOLGOWO
The Flying Dive celebration - DBQDUXQTRWTVXYDC
Dance celebration - KBRRWKUIRSTWUJQW
River Dance celebration - MIKAKPUMEEWNTQVE
Dying Fly celebration - DVMNJPBTLHJZGECP
Side Slide celebration - VNDWDUDLMGRNHDNV
Final Match Ball - FGWIXGFXTNSICLSS

After the celebrations have been unlocked through the appropriate code, use one of the follow codes to execute the corresponding celebration:

CELEBRATION - CHEAT CODE
African Dance - Press LT + B.
Baby Cradle - Press LT + A.
Flying Dive - Press LT + Y.
Ice Skating - Press RB + A.
Prancing Bird - Press RB + B.
River Dance - Press RB + X.
Side Slide - Press RB + Y.

Unlock the following packs by performing the corresponding tasks:

PACK - HOW TO UNLOCK
Pack #1 - Earn the Adidas Golden Boot Award (win the FIFA World Cup and have one of your team's members be the top scorer of the World Cup).
Pack #2 - Take the lead by scoring within the first five minutes of a match.
Pack #3 - Score within five minutes following a goal you just made.
Pack #4 - Score 100 goals.
Pack #5 - Perform a Hat Trick or score three goals with the same player in a single match.

Unlock the following shoes by entering the corresponding codes at the password screen:

SHOE - PASSWORD
Adidas adiPure III TRX Black/Sun - HHDO-PWPM-IXZQ-OJOZ
Adidas F50 adizero Black/Sun/Sun - SGFS-TZPP-XCHH-MJMH
Adidas F50 adizero Chameleon - VOKM-NEZT-JOQP-ULUT
Adidas F50 adizero Sun/Black/Gold - YOZC-CVIF-JGKQ-JWTW
Adidas Predator_X - Black/Sun - OCEG-ZCUH-XOBS-BNFU

ACHIEVEMENT - HOW TO UNLOCK
Single Star Group Stage (30 points) - Finish the Group Stage in the Online 2010 FIFA World Cup with a 1/2 - 1 star team.
Two Star Group Stage (20 points) - Finish the Group Stage in the Online FIFA World Cup with a 1.5 - 2 star team.
Three Star Group Stage (5 points) - Finish the Group Stage in the Online FIFA World Cup with a 2.5 - 3 star team.
Against all odds (75 points) - Win the Online 2010 FIFA World Cup with a 1/2 - 1 star team.
Ultimate Underdogs (50 points) - Win the Online 2010 FIFA World Cup with a 1.5 - 2 star team.
Played well as a team (15 points) - Win the Online FIFA World Cup with a 2.5 - 3 star team.
Dream Come True (5 points) - Advance past the group stage in the Online FIFA World Cup with a team rated 3 stars or lower.
Undefeated Group Stage (15 points) - Win all three group games and advance to the knockout stage in the Online FIFA World Cup.
Hospitality and Victories (10 points) - As the lead profile advance through the group stage as South Africa in 2010 FIFA World Cup
We'll just score more (10 points) - As the lead profile Concede 14+ In the Finals & Win the World Cup. Semi-Pro or higher difficulty.
Concede No Goals (10 points) - As the lead profile Advance to the round of 16 without conceding a goal - Semi-pro+ difficulty
Defend, Defend, Defend (10 points) - Lift the World Cup Trophy in the 2010 FIFA World Cup scoring 11 or fewer total goals :Lead Profile
Second Trip, First Goal (10 points) - Qualify & Score in the finals using any team that's been to the finals & not scored :Lead profile
First Team Selection (15 points) - Get promoted to the First team and play a match in Captain your Country.
Managers First Choice (15 points) - With a Virtual Pro play a game as the #1 ranked squad member in Captain your Country.
Co-op Success (5 points) - All four co-op players get a match rating of 7 or above in a captain your country match.
Practice Penalty Kicks (10 points) - Score at least 5 penalty Kicks in Penalty Shootout Practice
Masterful Performance (20 points) - Finish a captain your country where one of the players wins an end of tournament award.
The Captain (10 points) - In a Captain your Country campaign play a game as the captain for your country's first team.
Solid Performer (10 points) - Achieve an average match rating of 8 at the end of a single Captain your Country campaign.
Fair Play (5 points) - In a single Captain your country campaign Receive no match bans.
Hold the Line (5 points) - Earn a match rating of 8 or above as a Defender in Captain your Country.
Most Hat-tricks (20 points) - In Captain your Country score 2 or more hat-tricks in the Finals to beat the standing record.
2010 FIFA World Cup Mastery (125 points) - Defeat all 32 teams that qualified for the 2010 FIFA World Cup.
2006 FIFA World Cup Final (10 points) - Beat France using Italy on Semi-Pro or Higher Difficulty.
2002 FIFA World Cup Final (10 points) - Beat Germany using Brazil on Semi-Pro or Higher Difficulty.
1998 FIFA World Cup Final (10 points) - Defeat Brazil using France on Semi-Pro or Higher Difficulty.
Lightning Quick Strike (20 points) - Score in under 90 seconds to beat the standing record for fastest goal in a World Cup finals match.
Europe Qualifier (20 points) - As the lead profile qualify as a team from Europe in 2010 FIFA World Cup.
Asia Qualifier (20 points) - As the lead profile qualify as a team from Asia in 2010 FIFA World Cup.
Oceania Qualifier (20 points) - As the lead profile qualify as a team from Oceania in 2010 FIFA World Cup.
CONCACAF Qualifier (20 points) - As the lead profile qualify as a team from CONCACAF in 2010 FIFA World Cup.
South America Qualifier (20 points) - As the lead profile qualify as a team from South America in 2010 FIFA World Cup.
Africa Qualifier (20 points) - As the lead profile qualify as a team from Africa in 2010 FIFA World Cup.
World Cup Winner (125 points) - As the lead profile win the FIFA World Cup Final in 2010 FIFA World Cup.
Victorious! (100 points) - Win the FIFA World Cup in a Captain your Country campaign.
Shameful (0 points) - I've quit out of at least 5 ranked matches while losing.
First time on the world stage (15 points) - Play with a team in the Online FIFA World Cup that's never qualified for the real World Cup Finals.
Adidas Golden Shoe (25 points) - Beat the standing record by scoring 10 goals in an Online FIFA World Cup with a single player.
Better luck needed next time (20 points) - Finish the group stage without advancing to the Knockout stage of the Online 2010 FIFA World Cup.
Practice Makes Perfect (5 points) - Enter the training grounds to practice after a loss.
Pressure Cooker (15 points) - Score in a penalty shootout using your Virtual Pro and win the game.
2 Button Mentor (10 points) - Play and win a co-op game where at least one user is on 2 Button Controls.
2010 FIFA World Cup Fever (10 points) - Challenge and defeat someone with this achievement in the Online FIFA World Cup.