Here is the full list of all 20 SMASHING THE BATTLE achievements.
Clear The Survivor story mode
Clear The Chaser story mode
Unlock all the secret documents
Complete the Fan Art collection
Destroy Buildbots
Destroy Boss Buildbots
Evade hazards/attacks
Purchase items from the Shop
Purchase costumes
Destroy item containers
View Credits
Upgrade stats/skills
Clear Challenge mode
Rescue Workers
Get a Massive Kill
Clear Challenge Lv. 10
Clear Challenge Lv. 20
Clear Challenge Lv. 40
Clear Challenge Lv. 60
Clear Challenge Lv. 80