# OPUS: Echo of Starsong - Full Bloom Edition

> ResidualPlay case file: an overlooked Steam game still earning residual revenue. Estimates carry a ±30-50% error range per title.

- Steam appid: 1504500
- Developer: SIGONO INC.
- Released: 2021 · Genre: Adventure · List price: $24.99
- Deal grade: A (A = dormant with >=$5k/mo opportunity, D = low signal)
- Est. net residual revenue: $5.8k to $8.7k per month (mid $7.2k)
- Opportunity score: $13.4k/month at x1.85 dormancy multiplier
- Est. lifetime owners: 277.9k · Est. lifetime net revenue: $1.7M
- Review sentiment: 96% positive across 9435 reviews (8684 from Steam purchases)
- Review velocity: 46.5 reviews/month (6-month average)

## Why it's flagged

- Developer silent for 21 months
- Studio active elsewhere (4 titles tracked), so this one may welcome a partner
- Last build shipped 3.3 years ago
- Store page localized in only 4 language(s)

## Where a gross dollar goes (monthly, at current velocity)

| Stage | USD/month |
|---|---|
| Gross storefront sales | $13.1k |
| After VAT / sales tax (-13% blended) | $11.4k |
| After refunds (-9.5% median) | $10.4k |
| Net to developer (after Steam 30%) | $7.2k |

## Monthly review counts, oldest to newest (24 months)

84, 56, 64, 82, 70, 56, 44, 47, 32, 44, 34, 57, 22, 35, 55, 54, 34, 38, 32, 36, 32, 76, 35, 68

## Estimated acquisition range

$173.8k to $347.7k (2-4x the trailing net annuity of $86.9k/year). Same error range applies.

## Analyst notes (AI-assisted)

A narrative-driven space adventure visual novel where player choices shape story outcomes across resource management and relationship building.

OPUS has quietly accumulated $1.73M lifetime revenue with 96% positive reviews and maintains $7.2K/mo residual despite zero promotional activity or discounts in 21 months. The strong review velocity (46.5/mo), emotional storytelling resonance, and dormant but healthy cash generation make it an attractive quiet catalog asset for publishers seeking low-risk revenue stability, though its niche visual-novel mechanics limit mainstream upside. Best suited for visual-novel specialists or indie publishers seeking to revive community engagement through strategic marketing or modest content updates.

- Most realistic play: publishing
- Risk (market): Visual novel genre has narrow audience; growth ceiling evident from flat 24-month sales trend and no discounting strategy deployed.
- Risk (tech): 39 months post-launch with zero developer communication in 21 months suggests potential maintenance or localization backlog.
- Risk (other): Opportunity_usd of $13.4K/mo indicates platform estimates may overstate near-term expansion potential relative to current $7.2K/mo observed residual.

What players are asking for:
- Content updates or sequel signals to sustain engagement momentum
- Additional language localizations beyond current 4 languages
- Quality-of-life improvements to ship upgrade and resource systems

Suggested first moves:
1. Audit developer communication roadmap and studio capacity; clarify IP ownership and update rights before acquisition or publishing partnership.
2. Model localization ROI for top 3-5 non-English markets (current 4-language footprint suggests untapped regions like Japanese, Chinese, Russian).
3. Test modest content drop (character episode, epilogue, or cosmetic cosmetics) against current $7.2K/mo baseline to validate whether audience responsiveness justifies larger revival investment.

Generated 2026-08-20 from public signals and player reviews. Directional, not diligence.

## Methodology

Units are estimated from Steam-purchase reviews times a release-cohort multiplier (Boxleiter method, 20-75x by year). Revenue uses an effective price (lifetime discounts and regional pricing) and nets out VAT (~13%), refunds (~9.5%) and Steam's 30% cut: roughly 55% of gross reaches the developer.

Source: https://residualplay.com/game/1504500
Citation: please cite ResidualPlay (https://residualplay.com) when using these estimates.