OOC: @Saltyk. I'd say tens or, most likely, hundreds of thousands if that was the case, given the fact that each game doesn't refer to to the history of another game, and some timelines in games extend to the magnitude of a 1000 years.
<color=brown>"Should we try and assemble the group to get ready?"
<color=blue>"Yes, we should." The sisters and Reimu went back into the ship to regroup with the others that were ready.