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