Where can I find Particle in Greppen?

Particle can also be found in these cities:

Altdorf Baar Buchrain Buochs Cham Ebikon Emmen Goldau Hitzkirch Horw Ibach SZ Ingenbohl Kriens Küssnacht Lucerne Malters Rain Rotkreuz ZG Sarnen Sempach Stans Steinhausen Unterägeri Urswil Wädenswil Zug

You can also find this in Greppen:

Mixed Rolls Baking Soda Rusk Food For Allergy Sufferers Potato Dishes Fitness Drinks Espresso Ground Pastries Nuts Vitamins And Minerals