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