Hello, players of Red Stone.
We have found an issue where the in-steam browser shows black screen when trying to purchase Points from Steam.
As a temporaray solution, please follow the instructions below.
1. Open Red Stone Point Shop from in-game.
2. Click "Charge" button for screen to show steam in-game browser.
3. Copy the web page address from the steam web browser. (Black Screen)
4. Paste the address into other web browser of your choice,such as google chrome.
You should be able to process with purchasing points after logging into your steam account via web.
We apologize for any inconveniences caused.