Here is the full list of all 28 Manual Samuel achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Get gold on every time trial
Unlock all the Achievements in Manual Samuel
Get silver or higher on every time trial
Get bronze or higher on every time trial
Complete Story Mode Co-Op
Found every hashtag
Kill every robot
Blow up Tony
Went to work without shoes
Completed Sams house only breathing in 15 times
Tip Tony
Skipped a cinematic
Drove 150 km per hour
Made no stains on yourself
Didn't fall down the stairs
Complete Story Mode Single Player
Complete Level 8
Didn't skip any cinematics
Blink 2000 times
Complete Level 7
Complete Level 6
Complete Level 5
Drink two cups of coffee
Spoke perfectly
Complete Level 4
Complete Level 3
Complete Level 2
Complete Level 1