Here is the full list of all 27 Kill The Plumber achievements.
Beat speedrun 3 in under 6 minutes.
Beat level 144.
Get all 432 stars.
Beat level 132.
Get 108 stars in map 3.
Kill the plumber 250 times.
Beat level 120.
Beat level 108.
Beat speedrun 2 in under 5 minutes.
Beat level 96.
Get 108 stars in map 2.
Beat level 84.
Beat level 72.
Beat level 60.
Beat speedrun 1 in under 4 minutes.
Kill the plumber 100 times.
Beat level 48.
Get 108 stars in map 1.
Beat level 36.
Kill the plumber on level 23 before the timer runs out.
Beat level 24.
Beat level 10 without jumping.
Beat level 12.
Beat level 11 in under 6 seconds
Kill the plumber 9 times.
Kill the plumber in level 4.
Get stomped on level 1