When Red Sea Crossing was apparently sold mail order only (from what I recall), then it makes the distinction a little harder. It doesn't appear to have been sold at retail. It depends what the qualification is to not be in the homebrew section, and instead in the US or non-US sections. After all, the Atari Club releases (eg. Quadrun, Crazy Climber) were for the most part not sold in shops either, just mail order.