Here is the full list of all 50 The Black Eyed Peas Experience achievements worth 1,000 gamerscore.
Play with two dancers and two vocalists in Deluxe Experience
Play with a vocalist in Deluxe Experience
Rack up 50,000 Followers
Clear any song at Climax on Alien difficulty
Rack up 25,000 Followers
Clear any song at Zero-G on Alien difficulty
Watch all the tutorials
Clear any song at The Yard on Alien difficulty
Earn rank S on Alien difficulty
Earn rank A or higher on Alien difficulty
Get a combined high score of 10,000,000 points
Clear any song at Area 246 Tokyo on Alien difficulty
Get 1,000 smooth transitions in Deluxe Experience
Clear any song at Climax on Machine difficulty
Apply a fashion accessory to all available avatar customization slots
Clear any song at Zero-G on Machine difficulty
Earn rank S on Machine difficulty
Earn rank A or higher on Machine difficulty
Clear any song at The Yard on Machine difficulty
Dance every song in Deluxe Experience
Get a combined high score of 5,000,000 points
Get 1,000 "incredible!!" dance ratings in Deluxe Experience
Earn rank A or higher 3 times in a row in Deluxe Experience
Clear any song at Area 246 Tokyo on Machine difficulty
Earn rank S on Human difficulty
Dance to the same song at every venue at any difficulty
Clear any song at Climax on Human difficulty
Earn rank A or higher on Human difficulty
Clear any song at Zero-G on Human difficulty
Play in co-op mode in Deluxe Experience
Create 10 dance routines in "choreo-maker" mode
Earn rank C or higher on a custom dance routine
Create a dance routine in "choreo-maker" mode
Clear any song at The Yard on Human difficulty
Watch the credits to the end
Clear a Dance Challenge for the first time
Take a lesson from the dance coach
Register a score on the Leaderboards for the first time
Successfully strike a final pose in Deluxe Experience
Clear any song at Area 246 Tokyo on Human difficulty
Customize an avatar for the first time
Clear all of Taboo's Dance Challenges
Clear all of will.i.am's Dance Challenges
Clear all of Fergie's Dance Challenges
Clear all of apl.de.ap's Dance Challenges
Unlock all accessories
Play a song with vocalist earning only "great!" or "incredible!!" vocal ratings in Deluxe Experience
Dance to a legendary song on Alien difficulty and earn rank S
Clear co-op mode with both dancers earning rank S in Deluxe Experience
Dance 323 times in Deluxe Experience