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