Here is the full list of all 35 Arsenal Demon achievements.
Slay 5 enemies while maintaining a speed of over 20.
With 10 shackles clamped, slay the final boss.
Clamp every shackle onto yourself and conquer the final boss.
Clamp 20 shackles and start a run.
Maintain a survival time of 2 minutes.
Maintain a survival time of 4 minutes.
Maintain a survival time of 8 minutes.
Charge your critical gauge 50 times in one run.
Jump for a total of 500 times across all runs
Slay 100 angels across your runs.
Slay 500 angels across your runs.
Slay 2000 angels across your runs.
Run along walls for a total of 10 Minutes across all runs
Attempt your first escape.
Enjoy the thrill of your tenth escape.
Make a mockery of the angels and start your 100th escape.
Level up yourself and all weapons to 50
Level up one weapon to 50
Break glass for a total of 10 times across all runs
Break glass for a total of 100 times across all runs
Break glass for a total of 1000 times across all runs
Complete Training Mode atleast once
From the highest point in a level, practice a reckless disregard for gravity.
Destroy 100 Explosive Barrels across all runs
Destroy 500 Explosive Barrels across all runs
Destroy 1000 Explosive Barrels across all runs
Slay 5 enemies with explosive barrels in one run.
Slay each and every type of Angel the System pits against you.
With Railguns in each hand, shoot 50 Angels in a row without missing.
Achieve momentum of over 50 speed.
Dash for a total of 100 times across all runs
With twin Katanas, slay 100 Angels in one run.
Jump off an Angel.
For 300 seconds in a combat mode, exercise restraint against the Angels.
For 100 seconds during a run, do not fire weapons and maintain a speed of at least 1.