# Kingdom of Cards

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

- Steam appid: 3160500
- Developer: Rubber Duck Games
- Publisher: Gamirror Games
- Released: 2025 · Genre: Casual · List price: $11.99
- Deal grade: D (A = dormant with >=$5k/mo opportunity, D = low signal)
- Est. net residual revenue: $255 to $382 per month (mid $318)
- Opportunity score: $318/month at x1.00 dormancy multiplier
- Est. lifetime owners: 2.4k · Est. lifetime net revenue: $9.5k
- Review sentiment: 77% positive across 100 reviews (74 from Steam purchases)
- Review velocity: 3.2 reviews/month (6-month average)

## Why it's flagged

- Developer active, last post 11 months ago
- Last build shipped 10 months ago

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

| Stage | USD/month |
|---|---|
| Gross storefront sales | $578 |
| After VAT / sales tax (-13% blended) | $503 |
| After refunds (-9.5% median) | $455 |
| Net to developer (after Steam 30%) | $318 |

## Monthly review counts, oldest to newest (10 months)

37, 12, 4, 1, 0, 15, 2, 1, 1, 0

## Markets by review language

- japanese: 3%
- schinese: 43%
- german: 1%
- english: 41%
- russian: 1% (game NOT localized in this language)
- spanish: 10% (game NOT localized in this language)

Localization gap: 12% of measured reviews are written in languages the game does not support (top: spanish). Localizing is likely immediate market expansion.

## 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/3160500
Citation: please cite ResidualPlay (https://residualplay.com) when using these estimates.