Here is the full list of all 42 Gunpoint achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Create a custom mission with at least one objective.
Jump into an Enforcer to knock him through a window.
Notice the story doesn't necessarily gel with the mechanics. Become qualified games journalist.
Mock the chief of police at a critical moment.
Complete the police chief's missions without incriminating yourself.
Complete a mission that has guards with no violence, witnesses or loud noises.
Help justify my early, not entirely wise choice of game name by holding someone at gunpoint with the Resolver.
Upgrade your Bullfrog Hypertrousers to pounce instantly.
Upgrade your battery capacity to the non-figurative max.
Use the Hushcracker to jump through a window silently (outside of the test lab).
Complete a mission faster than I can.
Publish your personalised epilogue.
Kick Fritz Gessler's office door into him.
Complete the game.
Catch a guilty man at the expense of freeing an innocent one.
Use the Longshot to make a guard unintentionally shoot another (outside of the test lab).
Use the Gatecrashers to kick a door through a window.
Use the Gatecrashers to kick a door into a guard.
Use the Gatecrashers to kick a door off its hinges.
Steal Gessler's technology for Rooke.
Use no violence at all on a mission that has guards.
Upgrade your Bullfrog Hypertrousers to maximum jump strength.
Use the Prankspasm to knock out someone who isn't standing near a power socket (outside of the test lab).
Use the Crosslink to create an infinite loop that burns itself out.
Get knocked down by an opening door.
Leave no living witnesses to your presence on a mission that has guards.
Wire an elevator button to trigger something when the elevator arrives.
Use the Dropshot to land silently from a great height.
Knock a guard out by opening a door into him.
This is an achievement in name only. No-one admires you for punching a guy that many times.
Voluntarily tell Katie the truth.
Chicken out of telling Katie the truth at the last minute.
Tell Gessler that Rooke's hired you to betray him.
Conceal your presence at the DataSec break-in from Mayfield.
Free an innocent man at the expense of catching a guilty one.
Knock Fritz Gessler out with a punch.
Beat Fritz Gessler to death.
Shoot Fritz Gessler.
Defeat Gessler by rewiring his gun.
Knock Fritz Gessler out of his office window.
Intimidate Fritz Gessler into surrendering.
Slam Fritz Gessler's office door into him.