# Island Market Simulator

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

- Steam appid: 3391510
- Developer: Zentium Studio
- Released: 2026 · Genre: Casual · List price: $12.99
- Deal grade: C (A = dormant with >=$5k/mo opportunity, D = low signal)
- Est. net residual revenue: $2.1k to $3.2k per month (mid $2.7k)
- Opportunity score: $2.7k/month at x1.00 dormancy multiplier
- Est. lifetime owners: 3.8k · Est. lifetime net revenue: $16.7k
- Review sentiment: 84% positive across 161 reviews (120 from Steam purchases)
- Review velocity: 24.4 reviews/month (6-month average)

## Why it's flagged

- Developer active, last post 0 months ago
- Last build shipped 0 months ago

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

| Stage | USD/month |
|---|---|
| Gross storefront sales | $4.8k |
| After VAT / sales tax (-13% blended) | $4.2k |
| After refunds (-9.5% median) | $3.8k |
| Net to developer (after Steam 30%) | $2.7k |

## Monthly review counts, oldest to newest (5 months)

61, 15, 28, 5, 13

## Markets by review language

- koreana: 2%
- russian: 23%
- spanish: 2%
- japanese: 2%
- schinese: 26%
- french: 1%
- german: 4%
- english: 41%

## 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/3391510
Citation: please cite ResidualPlay (https://residualplay.com) when using these estimates.