Recettear: An Item Shop's Tale

Save Location
Windows

\Steam\steamapps\common\Recettear\save.dat

GOG

C:\Users\"USERNAME"\AppData\Local\VirtualStore\Program Files (x86)\Carpe Fulgur\Recettear - An Item Shops Tale\save.dat

Linux with steam compatibility tool

~/.steam/steam/steamapps/common/Recettear/save.dat