# Subway Builder

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

- Steam appid: 4039140
- Developer: Colin Miller
- Publisher: Borough Studio
- Released: 2026 · Genre: Indie · List price: $39.99
- Deal grade: C (A = dormant with >=$5k/mo opportunity, D = low signal)
- Est. net residual revenue: $86.4k to $129.5k per month (mid $107.9k)
- Opportunity score: $107.9k/month at x1.00 dormancy multiplier
- Est. lifetime owners: 11.0k · Est. lifetime net revenue: $147.6k
- Review sentiment: 57% positive across 352 reviews (344 from Steam purchases)
- Review velocity: 322.0 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 | $196.0k |
| After VAT / sales tax (-13% blended) | $170.5k |
| After refunds (-9.5% median) | $154.3k |
| Net to developer (after Steam 30%) | $107.9k |

## Monthly review counts, oldest to newest (1 months)

322

## Markets by review language

- english: 76%
- koreana: 2%
- russian: 8%
- spanish: 3%
- japanese: 1%
- schinese: 3%
- french: 3%
- german: 5%

## 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/4039140
Citation: please cite ResidualPlay (https://residualplay.com) when using these estimates.