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