# My Best Friend's Sister

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

- Steam appid: 4007700
- Developer: Naughty Sister
- Released: 2026 · Genre: Adventure · List price: $12.99
- Deal grade: C (A = dormant with >=$5k/mo opportunity, D = low signal)
- Est. net residual revenue: $3.2k to $4.8k per month (mid $4.0k)
- Opportunity score: $4.0k/month at x1.00 dormancy multiplier
- Est. lifetime owners: 13.8k · Est. lifetime net revenue: $60.1k
- Review sentiment: 71% positive across 456 reviews (431 from Steam purchases)
- Review velocity: 36.7 reviews/month (6-month average)

## Why it's flagged

- Developer active, last post 1 months ago
- Last build shipped 11 months ago
- Last discounted 1 months ago, 7 sales in the last 12 months

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

| Stage | USD/month |
|---|---|
| Gross storefront sales | $7.2k |
| After VAT / sales tax (-13% blended) | $6.3k |
| After refunds (-9.5% median) | $5.7k |
| Net to developer (after Steam 30%) | $4.0k |

## Monthly review counts, oldest to newest (7 months)

227, 83, 62, 15, 24, 28, 8

## Markets by review language

- japanese: 0% (game NOT localized in this language)
- schinese: 3%
- brazilian: 0%
- french: 2%
- german: 1%
- english: 72%
- russian: 20%
- spanish: 1%

## 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/4007700
Citation: please cite ResidualPlay (https://residualplay.com) when using these estimates.