Full list of all 34 Peggle 2 achievements worth 1,450 gamerscore. It takes around 15-20 hours to unlock all of the achievements in the base game on Xbox One.
The base game contains 28 achievements worth 1,000 Gamerscore, and there are 2 DLC packs containing 6 achievements worth 450 Gamerscore.
Completed 90 Optional Objectives
Completed 60 Optional Objectives
Won a level with the cool clear style shot
Completed every trial in the Peggle Institute
Completed 30 Optional Objectives
Cleared all pegs in a level
Completed every trial in Mountain Highs
Hit 300 green pegs
Hit 5000 orange pegs
Hit 10000 blue pegs
Completed every level in Gravely Grove
Completed every level in Gnorman's Gneighborhood
Completed every level in Winter Blunderland
Completed every level in Mountain Highs
Beat your first ace score
Completed every level in the Peggle Institute
Earned 3 free balls on one shot
Got 75,000 styleshot points in a shot
Cleared all orange pegs in a level
Complete every trial in Winter Blunderland
Complete every trial in Gnorman's Gneighborhood
Complete every trial in the Gravely Grove
Complete every Celestial Realm level
Complete every Celestial Realm trial
Complete 120 Optional Objectives
Complete 150 Optional Objectives
Complete 180 Optional Objectives
Win a level with at least 12 balls left (Except Trials and Multiplayer)
Completed all Hallelujah Hollow levels
Complete all Hallelujah Hollow trials
Complete 210 optional objectives
Completed all Jimmy's Jammin' Jaunt levels
Complete all Jimmy's Jammin' Jaunt trials
Complete 240 optional objectives