# Dark Bone Prison

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

**Measured on 2026-09-11 18:02 UTC.** The whole Steam catalog is re-measured daily; a game that just launched can move a lot between passes.

- Steam appid: 4859270
- Developer: Bunny Moon Shady
- Released: 2026 · Genre: Adventure · List price: $5.99
- Deal grade: B (A = dormant with >=$5k/mo opportunity, D = low signal)
- Est. net residual revenue: $2.2k to $3.4k per month (mid $2.8k)
- Opportunity score: $4.5k/month at x1.60 dormancy multiplier
- Est. lifetime owners: 2.4k · Est. lifetime net revenue: $4.9k
- Review sentiment: 97% positive across 67 reviews (61 from Steam purchases)
- Review velocity: 55.5 reviews/month (6-month average)

## Why it's flagged

- No developer announcement on record, ever
- Last build shipped 1 months ago
- Store page localized in only 4 language(s)

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

| Stage | USD/month |
|---|---|
| Gross storefront sales | $5.1k |
| After VAT / sales tax (-13% blended) | $4.4k |
| After refunds (-9.5% median) | $4.0k |
| Net to developer (after Steam 30%) | $2.8k |

## Estimated acquisition range

$67.0k to $133.9k (2-4x the trailing net annuity of $33.5k/year). Same error range applies.

## Markets by review language

- schinese: 100%

## Methodology

Units are estimated from Steam-purchase reviews times a release-cohort multiplier, 40-75x by year. Cohorts from 2020 on are calibrated against 182 sales milestones announced by developers; older ones follow the published Boxleiter tables. 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/4859270
Citation: please cite ResidualPlay (https://residualplay.com) when you publish or quote these estimates.