The Horizon 10-Year Anniversary Title update for Forza Horizon 5 has 8 achievements.
Smash all 4 Bonus Boards in the 'Horizon Origins' Story
Win your first Midnight Battle
Win every Midnight Battle
Earn 3 stars in all chapters of the 'Horizon Origins' Story
Complete all chapters of the 'Horizon Origins' Story
Complete the 'Welcome to Mexico' chapter of the 'Horizon Origins' Story
Complete all chapters of the 'Made in Mexico' Horizon Story
Earn 3 stars in all chapters of the 'Made in Mexico' Horizon Story