Here is the full list of all 20 The Splatters achievements worth 200 gamerscore.
Reach a total of 5,000 Stunts overall
Complete all levels in "Master Shots"
Complete all levels in "Combo Nation"
Earn three stars in each "Combo-Nation" level
You've blown up 10,000 bombs overall
Chain a single combo through an entire "Combo-Nation" level
Chain a 60-Stunt combo in a single level
You've blown up 5,000 bombs overall
You've performed more than 500 Air-Strikes overall
You've reached a total of 500 Stunts overall
You've earned three stars in each "Become a Talent" level
You've done eight different Stunts in a single level
You have completed "Become a Talent"
You've generated six Stunts with a single splatter
You've done a 30-Stunt combo in a single level
You've blown up 1000 bombs overall
You've performed 50 Air-Strike Stunts overall
You've done a 10-Stunt combo in a single level
You've performed 10 stunts in a single level
You've completed a level without failing