Steam app 1277930 · updated 12 Sep 2026, 19:29 UTC
For decades, superpowers and psychic abilities were thought to be mere science fiction, but the discovery of a certain particle called the "Astron" at the end of the 20th century proved to the world that these wondrous phenomena were real.
719 hourly samples, with the daily peak drawn over them. Weekends are shaded.
70 months, December 2020 to September 2026. The highest number of people in the game at once, each month, on a time axis -- a gap in the record stays a gap.
The highest number of people in the game at once, each month. Four, because four is as far back as the source keeps anything finer than one figure a month.
31 days, each one the highest figure that day. The source keeps no hourly detail this far back. Weekends are shaded.
31 days as the curve, each the highest figure that day. Behind it, 436 hourly samples from 13 Aug, which is as far back as the source keeps every hour. Weekends are shaded.
12 days as the curve, each the highest figure that day. Behind it, 283 hourly samples. Each dip is a night. Weekends are shaded.
Riddle Joker was released on 18 Dec, 2020.
Adult content includes a few illustrations with veiled nudity and kissing. Characters enter a sexual relationship that is not shown on screen, but acts of which are brought up in conversation. Also, every appearing character is over 18 years old.
| Language | Full audio |
|---|---|
| English | |
| Japanese | ● |
| Simplified Chinese | |
| Traditional Chinese |
A blank audio cell means full audio was not marked in the returned language list.
21 achievements in total.
24 developer announcements, Dec 2020 to Feb 2024 · times in UTC
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HIKARI FIELDWhat Steam runs, and with what. Straight from the app configuration.
| Description | Executable | Arguments | Platform | |
|---|---|---|---|---|
| Launch | RiddleJoker.exe | any |
The folders Steam Cloud syncs. The root is a token Steam uses for a location on your own machine, not a path this page can know.
| Root | Folder | Files |
|---|---|---|
gameinstall | savedata | * |
It runs on public data and somebody's spare time.
https://paypal.me/KintaroPalPay[email protected]0x4d559C765AA8BFe336E36d5b76024926767eD38dTJtctWU9uetJaTBoSybd1RErW7n9duTKVG