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