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