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