# Mamon King

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

- Steam appid: 4030290
- Developer:  LiTMUS Co., Ltd.
- Released: 2025 · Genre: Indie · List price: $12.99
- Deal grade: D (A = dormant with >=$5k/mo opportunity, D = low signal)
- Est. net residual revenue: $276 to $414 per month (mid $345)
- Opportunity score: $345/month at x1.00 dormancy multiplier
- Est. lifetime owners: 19.3k · Est. lifetime net revenue: $83.9k
- Review sentiment: 90% positive across 610 reviews (602 from Steam purchases)
- Review velocity: 3.2 reviews/month (6-month average)

## Why it's flagged

- Developer active, last post 8 months ago
- Last build shipped 8 months ago
- Store page localized in only 2 language(s)

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

| Stage | USD/month |
|---|---|
| Gross storefront sales | $626 |
| After VAT / sales tax (-13% blended) | $545 |
| After refunds (-9.5% median) | $493 |
| Net to developer (after Steam 30%) | $345 |

## Monthly review counts, oldest to newest (8 months)

594, 10, 4, 6, 3, 1, 1, 4

## Markets by review language

- english: 11%
- japanese: 88%
- brazilian: 0% (game NOT localized in this language)

## 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/4030290
Citation: please cite ResidualPlay (https://residualplay.com) when using these estimates.