# Harem vs Zombies

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

**Measured on 2026-08-30 08:45 UTC.** The whole Steam catalog is re-measured daily; a game that just launched can move a lot between passes.

- Steam appid: 4031460
- Developer: SerioZ team
- Publisher: TopHouse Publishing
- Released: 2026 · Genre: Casual · List price: $6.99
- Deal grade: C (A = dormant with >=$5k/mo opportunity, D = low signal)
- Est. net residual revenue: $862 to $1.3k per month (mid $1.1k)
- Opportunity score: $1.1k/month at x1.00 dormancy multiplier
- Est. lifetime owners: 1.0k · Est. lifetime net revenue: $2.3k
- Review sentiment: 82% positive across 34 reviews (25 from Steam purchases)
- Review velocity: 18.4 reviews/month (6-month average)

## Why it's flagged

- Developer active, last post 1 months ago
- Last build shipped 1 months ago

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

| Stage | USD/month |
|---|---|
| Gross storefront sales | $2.0k |
| After VAT / sales tax (-13% blended) | $1.7k |
| After refunds (-9.5% median) | $1.5k |
| Net to developer (after Steam 30%) | $1.1k |

## Markets by review language

- schinese: 4%
- brazilian: 4%
- french: 4%
- english: 36%
- russian: 52%

## 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/4031460
Citation: please cite ResidualPlay (https://residualplay.com) when you publish or quote these estimates.