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