# Zoo Protocol

> 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 08:35 UTC.** The whole Steam catalog is re-measured daily; a game that just launched can move a lot between passes.

- Steam appid: 4389810
- Developer: WaveMood
- Released: 2026 · Genre: Adventure · List price: $5.99
- Deal grade: D (A = dormant with >=$5k/mo opportunity, D = low signal)
- Est. net residual revenue: $447 to $670 per month (mid $558)
- Opportunity score: $558/month at x1.00 dormancy multiplier
- Est. lifetime owners: 1.1k · Est. lifetime net revenue: $2.2k
- Review sentiment: 94% positive across 51 reviews (27 from Steam purchases)
- Review velocity: 11.1 reviews/month (6-month average)

## Why it's flagged

- Developer active, last post 0 months ago
- Last build shipped 0 months ago
- 47% of reviews come from key activations (excluded from revenue estimates)
- Store page localized in only 3 language(s)
- Last discounted 1 months ago, 1 sales in the last 12 months

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

| Stage | USD/month |
|---|---|
| Gross storefront sales | $1.0k |
| After VAT / sales tax (-13% blended) | $881 |
| After refunds (-9.5% median) | $798 |
| Net to developer (after Steam 30%) | $558 |

## Monthly review counts, oldest to newest (1 months)

21

## Markets by review language

- english: 7%
- russian: 93%

## 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/4389810
Citation: please cite ResidualPlay (https://residualplay.com) when you publish or quote these estimates.