Here is the full list of all 21 Hot Heat Reset achievements.
Unlock all playable characters
Get an A on at least 32 levels
Get an A on all 64 levels
Complete Chapter 1: Unguarded
Complete Chapter 2: Discharge
Complete Chapter 3: Cannonade
Complete Chapter 4: Conclusion
Unlock all achievements
Use all abilities at least once
Replay a level and get a better grade
Get an A* on at least 11 levels
Get an A* on at least 22 levels
Complete all objectives at least once
Cause 500 Explosions
Plant 75 Plus Bombs
Complete 3-20 with "SCREEN"
Skip a set of dialogs
Plant a Time Bomb on the path of a moving block
Destroy 100 coins with "COAL"
Dodge a Turret shot with a Cannon Bomb
Destroy 7 coins with 1 Plus Bomb