It's hard for us to guess, but the Vogel has several other titles that have been available online for a number of years so I bet he can make a reasonably strong

It's hard for us to guess, but the Vogel has several other titles that have been available online for a number of years so I bet he can make a reasonably strong prediction. I would be very surprised if Geneforge 1 (which I don't think is his earliest title, but is several years old) hasn't sold more than 5 copies this year. The tail for his products is very long. Pretty flat I'd guess, but very long and since they're distributed digitally there's no reason not to keep them available, gradually dropping prices or making bundles available. Once 5 is released he could sell a "box set of the entire series" and spike sales of the old titles again.