Here is the full list of all 25 Bzzzt achievements.
The base game contains 21 achievements, and there is 1 DLC pack containing 4 achievements.
Finish the game on insane difficulty.
Use Quick Restart 200 times.
Watch Emily's sequence till the end.
Finish any stage in under 1.5 seconds.
Finish any stage with minimal score.
Finish the game.
Perform silver or golden flawless run in all story mode stages.
Finish the game on normal difficulty.
Collect all spare parts in all story mode stages.
Perform a golden flawless run in all story mode stages.
Finish the third boss fight.
Open Leaderboards.
Perform a golden flawless run in 30 stages.
Finish the second boss fight.
Die one hundred times.
Finish the first boss fight.
Perform a golden flawless run in 10 stages.
Beat a trophy time in ten stages.
Collect 100 spare parts.
Collect all spare parts and beat a trophy time in a stage simultaneously.
Finish the first stage.