Here is the full list of all 22 Fling to the Finish achievements.
Fling your partner 10,000 times.
Collect 99 ducks in the campaign gamemodes.
Collect 66 ducks in the campaign gamemodes.
Fling your partner 1,000 times.
Collect 33 ducks in the campaign gamemodes.
Fling your partner 100 times.
Place 1st in a tournament.
Place 1st in a tournament 10 times.
Place 1st in a tournament 100 times.
Collect all three Ducks in Clams Casino's Duck Hunt.
Collect all three Ducks in Mushy Mushroom's Duck Hunt.
Collect all three Ducks in Worms in Space's Duck Hunt.
Unlock 3 collectables using Tokens.
Unlock 10 collectables using Tokens.
Unlock 30 collectables using Tokens.
Beat Worms in Space without Flinging more than one time.
Beat Sunny Heights without falling off the jungle gym.
Complete UFO Race in Kooky's Canyon in under 150 seconds
Complete Fling Park's Ring-a-thon in under 100 seconds
Complete Coin Frenzy in Loony Lanes in under 400 seconds
Relax in the Fling Lounge in Perilous Paradise for 30 minutes.
Reach the end and beat the Credits Level.