Here is the full list of all 28 The Smurfs - there are Mission Vileaf achievements.
Get across the Laboratory without getting caught by Gargamel
Find all of the mandrakes
Complete the 100% of the game
Find all of the mushrooms
Build all of the upgrades
Find every vial
Find every piece of bark
Find all of Jokey’s presents
Perform 10 perfect jumps in a row
SmurfoGlide for 10 seconds
Complete the adventure in Easy mode
Complete the adventure in Normal mode
Complete the adventure in Hard mode
Complete the Chapter: Gargamel
SmurfoSprint for 100 meters
Perform a SmurfoSprint, Jump and SmurfoSplat combo!
Make 10 flowers of every color grow by using the Smufizer
Heal the entire village
Make Papa Smurf cough
Find and wake up Lazy 3 times
Complete the Chapter: The Swamp
Complete the Chapter: The Castle
Jump on 3 Vilecritters' heads in a row
Destroy 100 crates of Sarsaparilla
Build your first upgrade
Complete the Chapter: The Forest
Complete the Chapter: The Village
Find the flower for the Smurfizer