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 180 Optional Objectives
Completed 150 Optional Objectives
Completed 120 Optional Objectives
Completed 90 Optional Objectives
Completed 60 Optional Objectives
Won a level with the cool clear style shot
Completed every Celestial Realm trial
Completed every Celestial Realm level
Completed every trial in the Gravely Grove
Completed every level in Gravely Grove
Completed every trial in Gnorman's Gneighborhood
Hit 5000 orange pegs
Completed every level in Gnorman's Gneighborhood
Hit 10000 blue pegs
Won a level with at least 12 balls left
Completed every trial in Winter Blunderland
Completed every trial in Mountain Highs
Completed every level in Winter Blunderland
Hit 300 green pegs
Completed every trial in the Peggle Institute
Completed every level in Mountain Highs
Completed 30 Optional Objectives
Completed every level in the Peggle Institute
Cleared all pegs in a level
Earned 3 free balls on one shot
Got 75,000 styleshot points in a shot
Cleared all orange pegs in a level
Beat your first ace score
Completed 210 optional objectives
Completed all Hallelujah Hollow trials
Completed all Hallelujah Hollow levels
Completed 240 optional objectives
Completed all Jimmy's Jammin' Jaunt trials
Completed all Jimmy's Jammin' Jaunt levels