BestPornGames.com review
BestPornGames.com gives individual games and stores separate places in its directory. I'd use its visual novel section if I already knew the kind of game I wanted, or the shops page if I wanted to see what one publisher offers.
Pick a game format or start with a store
Visual novels have their own section. The shops category points to entries such as Nutaku Shop, where the directory has a write-up about the store itself. Fenoxo is a useful comparison when I'd rather go directly to a creator's own catalog and see the play options listed for a particular release.
Check what the next page is offering
The Nutaku Shop entry has a review on BestPornGames.com and a separate Play button that points outside the directory. I'd read the write-up first, then look up the title or store with the publisher before relying on availability or making a purchase.
Anabel’s take
I'd use the genre list to find the name of a game. If I wanted to try it, I'd look for the publisher's page to see which release I was opening and what it requires.