Here is the full list of all 36 UFC Undisputed 2010 achievements worth 1,000 gamerscore.
Act as a trainer in Xbox LIVE Camp Training
Compete in a Champion vs. Champion fight and also make the UFC Hall of Fame in Career Mode
Win a Champion vs. Champion fight in Career Mode
Play all modes at least once, check the shop and all options
Go through all tutorials
Now you're dirty boxing with Pride!
Complete the Title Defense Mode
Win a fight by Flash KO against a CPU opponent.
Is there a doctor in the stadium!?
Win by all methods of stoppage against the CPU. (KO, TKO, Submission, Doctor Stoppage)
Win 100 Xbox LIVE Ranked Matches
Win 75 Xbox LIVE Ranked Matches
No respect for your opponent.
Win 50 Xbox LIVE Ranked Matches
Win 10 Xbox LIVE Exhibition Ranked matches consecutively
Xbox LIVE Exhibition - Obtain all types of gold medals
Download an Event for Event Mode
Complete the Title Mode
Collect all Topps® UFC trading cards
Win 25 Xbox LIVE Ranked Matches
Win a fight by Submission against a non-CAF, Expert CPU in the first 60 seconds of Round 1.
Complete the Career Mode
Reach "World Class" (Level 3) status with a technique or move.
Complete all A, B, and C class challenges (Red and Blue Corner)in a fight in Ultimate Fights Mode.
Complete a post-fight interview in Career Mode
Win a fight against the CPU with a fighter you've created in Create A Fighter
Create a fighter in Create A Fighter
Experience an entire 8 fight event card in Event Mode.
Win a fight with a Submission Transition
Win a fight by KO/TKO against a non-CAF, Expert CPU in the first 60 seconds of Round 1.
Win 10 Xbox LIVE Exhibition matches in total
Join an Xbox LIVE Camp
Win an Xbox LIVE Exhibition Ranked match
Touch gloves at the beginning of 10 matches.
Win at least one championship in the Tournament Mode
Dodge 3 consecutive strikes via sway (Outside of Tutorial Mode)