The Porsche Expansion Add-on for Forza Motorsport 6 has 19 achievements worth 250 gamerscore.
Complete all Porsche Showcases
Finish "The Future" Era
Finish "Motorsport Next" Series
Complete 40 laps on VIR in Multiplayer
Race a mid-engine Porsche in Multiplayer or Free Play 10 times
Race the Cayennne or Macan in Multiplayer or Free Play 10 times
Race a front-engine Porsche in Multiplayer or Free Play 10 times
Finish "Supercar Synthesis" Series
Finish "Growing Excellence" Series
Finish "The Evolution" Era
Finish "Racing Dominance" Series
Complete 1 Porsche Showcase
Finish "Building Innovation" Series
Fully explore the Porsche 919 in Forzavista
Set a lap time under 1:30 at VIR Full
Play VIR in Multiplayer
Finish "The Origin" Era
Finish the Porsche Anthology Initial Experience Race
Equip a Porsche Badge