Here is the full list of all 11 KENGOHAZARD2 achievements.
Walk through the creepy corridors of the building
Clear "Despair difficulty"
Take a gun for the first time
Shoot a gun at the enemy
Go through the corridor where the enemy is
Get many bullets
Clear the scenario
Enter the forest house
Kill the hero's future
Shoot a chain in the hall
No continue, clear without interruption