# Rock Island

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

- Steam appid: 3561030
- Developer: Silence Moon
- Released: 2026 · Genre: Casual · List price: $5.99
- Deal grade: C (A = dormant with >=$5k/mo opportunity, D = low signal)
- Est. net residual revenue: $3.5k to $5.3k per month (mid $4.4k)
- Opportunity score: $4.4k/month at x1.00 dormancy multiplier
- Est. lifetime owners: 8.5k · Est. lifetime net revenue: $17.1k
- Review sentiment: 68% positive across 310 reviews (266 from Steam purchases)
- Review velocity: 87.3 reviews/month (6-month average)

## Why it's flagged

- Developer active, last post 2 months ago
- Last build shipped 2 months ago
- Last discounted 1 months ago, 2 sales in the last 12 months

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

| Stage | USD/month |
|---|---|
| Gross storefront sales | $8.0k |
| After VAT / sales tax (-13% blended) | $6.9k |
| After refunds (-9.5% median) | $6.3k |
| Net to developer (after Steam 30%) | $4.4k |

## Monthly review counts, oldest to newest (3 months)

199, 55, 8

## Missed seasonal-sale revenue (modeled)

Skipped 2 Steam seasonal sale window(s) in the last 3 months. Running a -50% discount in those windows is modeled at +$1.6k net in total, assuming a unit uplift of x3.0 (industry-typical for old catalog titles). Same ±30-50% error range applies.

## Markets by review language

- german: 5%
- russian: 9%
- brazilian: 2%
- english: 27%
- koreana: 17%
- spanish: 0%
- japanese: 6%
- schinese: 32%
- french: 2%

## 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/3561030
Citation: please cite ResidualPlay (https://residualplay.com) when using these estimates.