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