Here is the full list of all 42 Slide Stars achievements.
Finish a race with Luciano Spinelli on the Slice of Watermelon
Finish a race with Svetalia Kar Dashi on the Strawberry
Finish a race with Amusement Force Greg on the Tractor Tire
Finish a race with Amusement Force Kes on the Baby Turtle
Finish a race with Enji Night on the Chinese Ghost Dragon
Finish a race with Enya Wandres on the Mercenary Raft
Finish a race with Kat Wonders on the Flamingo
Finish a race with Veronica Bielik on the Baby Pig
Finish a race with Ben Azelart on the Skyrocket
Finish a race with Lexi Rivera on the Unicorn
Finish a race with Alan Stokes on the Seahorse
Finish a race with Alex Stokes on the Llama
Finish a race with Milan Knol on the Hydro Jet Mech
Finish a race with ApoRed on the Hot Sauce Bottle
Finish a race with Prof. Dr. Freek Vonk on the Live shark
Finish a race with Doctor Mike on the Log
Finish a race with Jeff Seid on the Dumbell
Finish a race with Holly H on the Rubber Duck
Finish a race with Billy Rose on the Banana Boat
Finish a race with Brent Rivera on the Coin
Collect your first star
Collect 10 medals
Collect all stars
Respawn 30 times
The monkey got to you ten times
The crocodile got to you ten times!
The chicken got to you ten times!
Unlock the American swamp
Complete both Kraken levels
Complete 100 races
Collect all stars and medals of the Jungle
Collect all stars and medals of the American Swamp
Find all hidden finishes
Collect all time medals
Collect all perfect medals
Collect all likes medals
Collect 50 fruits
Check out all bio's
Trigger all eight affinities once
Get a 10x likes multiplier
Unlock all outfits
Unlock all ride specials