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