https://de.wikipedia.org/wiki/Allgäubahn_(Bayern) The Bavarian Allgäubahn is a double-track, largely non-electrified railway line from Munich via Buchloe , Kaufbeuren and Kempten (Allgäu) to Lindau (Lake Constance) . The section Buchloe-Lindau was built as part of the Ludwig-Süd-Nord-Bahn . In the section from Munich to Geltendorf the route was electrified in 1968 . By the German course it is called course book course 970. Rolling stock: -BR 218: -Regional Express with stops in Buchloe, Kaufbeuren, Günzach, Kempten -Eurocity with stop in Buchloe and Kempten -Intercity with stop in Buchloe and Kempten Regional Express Eurocity Intercity -BR 612: Regional Express with stops in Buchloe, Kaufbeuren, Biessenhofen, Günzach, Kempten -ER 20 Eurorunner: ALEX trains with stops in Buchloe, Kaufbeuren and Kempten -BR 642: Regional train with stops in Buchloe, Kaufbeuren, Biessenhofen, Günzach, Kempten (The regional train runs only Buchloe-Kempten) -BR 245: -bike train with stop in Buchloe, Kaufbeuren, Kempten -Regional Express with stops in Buchloe, Kaufbeuren, Günzach, Kempten Regional Express bike train -double-decker control car (with BR 218 and BR 245): -bike train with stop in Buchloe, Kaufbeuren, Kempten -Regional Express with stops in Buchloe, Kaufbeuren, Günzach, Kempten -BR 232: -freight train -BR 294: -freight train
There is this route which covers most of what you are suggesting https://store.steampowered.com/app/...__Lindau__Immenstadt__Oberstdorf_Route_AddOn/ Peter