Free to play
Rocket of Whispers: Prologue - Steam Copies Sold & Revenue Statistics
Game information
Game information
Copies Sold
10K
New owners
May 2026
Only for membersOwners
Steam Copies Sold & Revenue by Player Language
Game context & FAQ
Quick answers
- Rocket of Whispers: Prologue is free-what should I read on this page?
- Focus on language share, wishlists, and review velocity. Paid gross bands target premium titles, but the context blocks here still anchor organic demand for Rocket of Whispers: Prologue.
- Where do I find language mix data for Rocket of Whispers: Prologue?
- Look for “Steam Copies Sold & Revenue by Player Language” above; it breaks review volume down by Steam’s detected languages, which also drives our regional revenue weighting.
Information
Rocket of Whispers: Prologue was released on Steam on September 12, 2018 and belongs to the group of popular free-to-play titles on the platform.
In May 2026, the game reached >1K installations, reflecting strong organic user acquisition.
This is the 3th game released by SIGONO INC., highlighting the developer’s active release schedule.
The player base is multilingual and distributed across several Steam interface languages, including:
• Traditional Chinese
• English
• Japanese.
For free-to-play games, language diversity plays a substantial role in retention, user engagement and long-term audience growth.
The current Steam rating is fairly positive.
Compared to the previous project OPUS: Rocket of Whispers, the game now holds a lower user score.
Only game sales are included in the calculations, DLC sales and in-app purchases are excluded.
Rocket of Whispers: Prologue is tagged as Free to Play on Steam, so the headline paid-unit charts emphasize optional DLC or past paid eras when they existed.