Succubus Stories will be coming to Steam on September 19!
It will be $5.99, and this will be a special edition somewhere between the Patron Edition and the Free Edition. It won't have the built-in cheats and you'll need to unlock all the free outfits like in the Free Edition, but you'll also have immediate and permanent access to all Patreon-exclusive outfits, both ones released prior and ones that will be released in the future. The Patron Edition will also continue to get new content at least one week early, and any future Patreon-exclusive content will also come to the Steam Edition aside from cheat stuff.
Patrons will be able to get codes, but they'll be opt-in and provided via the Patron Edition's Itch page for a limited time (this was just the easiest way I could do it). If you miss the window to get a code but still want one, you can message me here on Patreon and if you have paid $5.99 or more prior to the Steam release of the game, I'll send you a code!
The Steam Edition will support achievements and some other basic Steam features.
On a slightly different note, I am (begrudgingly) also working on a native Android port of the game, but the ETA on that is sometime next year.