The Fortune Island Add-on for Forza Horizon 4 has 24 achievements worth 500 gamerscore.
Get 3 Stars on every Drift Zone on Fortune Island.
Get 3 stars on the Needle Fall Danger Sign in the Morris Minor Traveller.
Get 3 Stars on every Trailblazer Gate on Fortune Island.
Get 3 Stars on every Speed Zone on Fortune Island.
Get 3 Stars on every Speed Trap on Fortune Island.
Find/Smash all 10 Treasure Chests.
Complete Round 3 of a #Forzathon Live Event on Fortune Island.
Complete The Leviathan in less than 8 minutes in the Ford Fiesta ST RX43.
Drive every Road in Fortune Island.
Come First in the Fortune Island Finale Races - The Leviathan and The Kraken.
Earn 21 Stars in Drift Club on Fortune Island.
Complete a Seasonal Championship on Fortune Island.
Get 3 Stars on every Danger Sign on Fortune Island.
Reach Round Ten of the Island Conqueror.
Find/Smash 5 Treasure Chests.
Reach Round Five of the Island Conqueror.
Earn at least 1 star at a Trailblazer Gate.
Reach Round Two of the Island Conqueror.
Find/Smash your first Treasure Chest.
Set up the Horizon Festival on Fortune Island.
Complete The Kraken in less than 6 minutes in the Saleen S5S Raptor.
3-Star The Forest Run Trailblazer Gate in the Peel P50.
Get over 180mph in the Koenigsegg CC8S at the Lady Of The Lake Speed Trap.
Get a time of 40 seconds or better in the Exomotive Exocet at the Halcyon Point Trailblazer Gate.