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