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