The short answer
The original Koikatsu is still available as "コイカツ！/ Koikatsu Party" on Steam.
Koikatsu Sunshine, on the other hand, has no official storefront left.
Note that the Steam release does not ship with a Japanese interface. Worth knowing before you buy.
Why people say it is gone
Illusion, the developer, ended development and sales of all its products on 18 August 2023. Its own shop and every Japanese storefront that carried the games — DLsite, FANZA and others — stopped selling them at the same time.
The Steam release is the exception and is still on sale. Reports that the game is "discontinued" usually refer to the Japanese storefronts and do not account for Steam.
What you can buy on Steam
| Product | Type | Price |
|---|---|---|
| コイカツ！/ Koikatsu Party | Base game | ¥6,290 |
| After Party | Paid DLC | ¥5,750 |
| Koikatsu Party VR | Free DLC | Free |
Prices are as shown on the Japanese Steam store and change with sales and region. Always check the store before buying.
Before you buy
- Supported languages are English, Simplified Chinese and Traditional Chinese
- The After Party DLC is English only
- The Steam release is the international version and differs from the Japanese release in some content
If you want to play in Japanese, HF Patch can switch the Steam release to Japanese. Its own documentation describes buying the Steam release and switching the language.
About Koikatsu Sunshine
Sunshine was never released on Steam, and since 18 August 2023 there is no official way to buy it.
This site does not point to unofficial sources. Sunshine mods are listed in the catalogue for people who already own the game.
After you buy
HF Patch is the usual starting point: it installs translations, fixes and the main plugins in one pass. Back up your game folder and save data before installing anything.
Last checked: 2026-08-05 (verified against the Steam store listing)