# Kotama and Academy Citadel

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

- Steam appid: 3639650
- Developer: Atomstring Games
- Publisher: 2P Games
- Released: 2026 · Genre: Action · List price: $19.99
- Deal grade: C (A = dormant with >=$5k/mo opportunity, D = low signal)
- Est. net residual revenue: $19.0k to $28.6k per month (mid $23.8k)
- Opportunity score: $23.8k/month at x1.00 dormancy multiplier
- Est. lifetime owners: 77.6k · Est. lifetime net revenue: $520.4k
- Review sentiment: 81% positive across 2887 reviews (2426 from Steam purchases)
- Review velocity: 142.0 reviews/month (6-month average)

## Why it's flagged

- Developer active, last post 2 months ago
- Last build shipped 2 months ago

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

| Stage | USD/month |
|---|---|
| Gross storefront sales | $43.2k |
| After VAT / sales tax (-13% blended) | $37.6k |
| After refunds (-9.5% median) | $34.0k |
| Net to developer (after Steam 30%) | $23.8k |

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

1587, 189, 137, 154, 81, 145, 146

## Markets by review language

- russian: 2%
- spanish: 1% (game NOT localized in this language)
- japanese: 6%
- brazilian: 1% (game NOT localized in this language)
- english: 19%
- schinese: 65%
- french: 0%
- german: 0%
- koreana: 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/3639650
Citation: please cite ResidualPlay (https://residualplay.com) when using these estimates.