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 Crosslink to create an infinite loop that burns itself out.
Use the Dropshot to land silently from a great height.
So This Is Why People Don't Like Me
Get knocked down by an opening door.
Open Door Policy
Knock a guard out by opening a door into him.
Use no violence at all on a mission that has guards.
I May Be Some Time
Upgrade your Bullfrog Hypertrousers to maximum jump strength.
I'll Aim When I'm Dead
Upgrade your Bullfrog Hypertrousers to pounce instantly.
Breaking And Entering
Use the Gatecrashers to kick a door off its hinges.
Low Flying Doors
Use the Gatecrashers to kick a door into a guard.
Complete the game.
Title Finally Relevant
Help justify my early, not entirely wise choice of game name by holding someone at gunpoint with the Resolver.
On The QT
Use the Hushcracker to jump through a window silently (outside of the test lab).
Publish your personalised epilogue.
Might As Well Have An Achievement For That Too
Use the Gatecrashers to kick a door through a window.
Alright, Have One! Just Stop!
Complete a mission that has guards with no violence, witnesses or loud noises.
Complete the police chief's missions without incriminating yourself.
Catch a guilty man at the expense of freeing an innocent one.
Jump into an Enforcer to knock him through a window.
Why Don't You Just Shoot Him?
Let It Go
Free an innocent man at the expense of catching a guilty one.
Acknowledged Ludonarrative Dissonance
Notice the story doesn't necessarily gel with the mechanics. Become qualified games journalist.
I Am Better At This Than Tom Francis
Complete a mission faster than I can.
Use the Longshot to make a guard unintentionally shoot another (outside of the test lab).
Not Really A Prank, Man
Use the Prankspasm to knock out someone who isn't standing near a power socket (outside of the test lab).
Sorry, Were You Using That?
I Taste Battery Acid
Upgrade your battery capacity to the non-figurative max.
I Just Really Don't Like Gessler
Not Worth The Bullet
Those Intex Models Jam
Create a custom mission with at least one objective.
Mock the chief of police at a critical moment.
Seven Story Takedown