# Sisters in Sin 🔞

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

- Steam appid: 4414250
- Developer: Lewd Star
- Released: 2026 · Genre: Casual · List price: $14.99
- Deal grade: C (A = dormant with >=$5k/mo opportunity, D = low signal)
- Est. net residual revenue: $4.0k to $6.1k per month (mid $5.1k)
- Opportunity score: $5.1k/month at x1.00 dormancy multiplier
- Est. lifetime owners: 5.2k · Est. lifetime net revenue: $25.9k
- Review sentiment: 77% positive across 163 reviews (161 from Steam purchases)
- Review velocity: 40.2 reviews/month (6-month average)

## Why it's flagged

- Developer active, last post 3 months ago
- Studio active elsewhere (16 titles tracked), so this one may welcome a partner
- Last build shipped 4 months ago

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

| Stage | USD/month |
|---|---|
| Gross storefront sales | $9.2k |
| After VAT / sales tax (-13% blended) | $8.0k |
| After refunds (-9.5% median) | $7.2k |
| Net to developer (after Steam 30%) | $5.1k |

## Monthly review counts, oldest to newest (4 months)

115, 19, 20, 7

## Markets by review language

- japanese: 1%
- schinese: 8%
- french: 2%
- english: 68%
- russian: 21%

## 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/4414250
Citation: please cite ResidualPlay (https://residualplay.com) when using these estimates.