Here is the full list of all 21 The Low Road achievements.
Spurn your fellow agent and complete your mission alone
Coddle your fellow agent and complete the mission together
Unseat the Soothmaker in a battle of wits
Collect all 5 false endings in one playthru
Bypass the age restrictions of a violent film
Reveal your true nature with the push of a button
Use your knowledge of Pierre La Piette to distract Penderbrook
Invent a new hair-removal product
Get Horace to wash his hair five times
Ruthlessly destroy a rival corporation
Drive the Fikus around the test track five times
Create a giant tin-can telephone
Use Horace as a drop point for the plant
Reach the roof without using violence
Spot the Docillio barge from Rev Island
Deliver the flyers without alerting Thornton
Complete Hab's Rhyme puzzle without a mistake
Successfully complete Lacey’s phone call
Take a prank phone call too far
Convince Lacey of your paranormal gifts
Try out a hideous nickname