Here is the full list of all 39 UFC Undisputed 3 achievements worth 1,000 gamerscore.
Play 500 or more ranked Xbox LIVE matches.
Clear 25% or more of all game modes.
Accumulate 15 hours of fight time.
Play an Xbox LIVE Fight Camp Sparring match.
Win 10 consecutive Fight Camp Exhibition matches.
Rate contents created by other players in Content Sharing.
Join an Xbox LIVE Fight Camp.
Play 10 or more ranked Xbox LIVE matches.
Win 5 ranked Xbox LIVE matches in a row.
Win a ranked Xbox LIVE match for the first time.
Win 25 fights consecutively in Title Defense Mode.
Transition to all of the ground positions.
Play and complete a 6, 7 or 8 card event in Event Mode.
Obtain a 100% completion score with both fighters in a fight in Ultimate Fights Mode.
Create a Highlight Reel with 10 or more different fighters.
Clear Title Mode without any interruption.
Defeat a COM on Advanced or higher in Exhibition or Tournament Mode with each Leg Submission.
Win a match on Ultimate in Exhibition or Tournament Mode with the Simulation Energy Settings.
Submission Slam or Stomp Escape the COM in Exhibition on Advanced Difficulty or Higher
Win in each division in Exhibition with Advanced Difficulty or higher.
Get the TKO win by damaging the opponent's legs.
KO the opponent with a soccer kick.
Rock an opponent with a Foot Stomp to the head in a PRIDE fight.
Watch a PRIDE entrance in Exhibition once without skipping.
Win a match against the COM on Experienced Difficulty while using a CAF in Exhibition Mode.
Create a Logo and apply it to a CAF as a Tattoo.
Create a CAF and modify the face with CREATE A FIGHTER.
10,000 or more shop points accumulated.
Complete Career Mode with a CAF or Roster Fighter.
Use 1 fighter in Career Mode to win the UFC championship in 2 weight divisions.
After a KO or TKO, land 4 finishing blows and win the match.
Use 1 fighter in Career Mode and win the WFA Championship, UFC Championship, and PRIDE Grand Prix.
Win against a CAF that obtained Career Hall of Fame in Exhibition on Expert Difficulty or higher.
Enter the Hall of Fame with a fighter in Career Mode.
Obtain any level 3 move for 1 fighter in Career Mode.
Play through each Training Game with a fighter in Career Mode.
Obtain a 4-star score in a Training Game with a fighter in Career Mode.
Create a Highlight Reel.
Select a guided tutorial