Here is the full list of all 20 Konrad the Rocket achievements.
Finish the game
Finish the game under 1 hour
Finish the game dying less than 30 times
Finished "The Beginning" without dying
Finished "Pride of our nation" without dying
Finished "The Doubt" without dying
Finished "Paranoia" without dying
Finished "The Collapse" without dying
Stay 3 minutes flying without touching the ground
Beat a level after dying 10 times
Beat a level after dying 50 times
Got killed by spikes 100 times
Got killed by lasers 30 times
Got killed by fans 20 times
Got killed by guns 100 times
Got killed by buzzsaws 50 times
Got killed by spike traps 30 times
Got killed by crushers 30 times
Got killed by mines 100 times
Got killed 1000 times