The Legends Pack Add-on for Project CARS 3 has 5 achievements.
Win a 3+ Lap race around Sakitto National in the Acura NSX '97.
Apply a Legends Pack decal to your car.
Upgrade a Toyota Supra MkIV to a Toyota Supra MkIV Racing with a 'Race Conversion'.
Complete 10 races using either the Mazda RX-7 or Mazda RX-7 Racing.
Complete all objectives in the Legends Pack Career Events.