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