Here is the full list of all 28 Ben 10: Power Trip achievements.
Complete everything in Grashugel Forest
Complete everything in Mt. Eisburg
Complete everything in Strudelbek City
Collect all the Records
Find all the Trinkets
Destroy All Decibel Concerts
Find all the Luck Upgrades
Destroy 10 Decibel Concerts
Complete all the Scooter Challenges.
Destroy 5 Decibel Concerts
Fast travel using the Rust Bucket
Defeat Hex and Save Strudelbek
Find the Omni-Guard
Defeat the Forest Power Spring
Find all the Power Upgrades
Unlock Four Arms
Defeat the City Power Spring
Unlock Shockrock
Unlock XLR8
Defeat the Mountain Power Spring
Unlock Diamondhead
Defeat your first Void Ruin
Complete your first Side Mission
Unlock Rath
Choose your first upgrade
Unlock Heatblast
Save all the citizens from monsters.
Find all the Toughness Upgrades