# Age of Solitaire : Build Civilization

> 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 07:54 UTC.** The whole Steam catalog is re-measured daily; a game that just launched can move a lot between passes.

- Steam appid: 2050530
- Developer: Eggtart Inc
- Released: 2022 · Genre: Casual · List price: $9.99
- Deal grade: C (A = dormant with >=$5k/mo opportunity, D = low signal)
- Est. net residual revenue: $100 to $149 per month (mid $125)
- Opportunity score: $262/month at x2.10 dormancy multiplier
- Est. lifetime owners: 1.2k · Est. lifetime net revenue: $2.9k
- Review sentiment: 79% positive across 29 reviews (29 from Steam purchases)
- Review velocity: 2.0 reviews/month (6-month average)

## Why it's flagged

- Developer silent for 3.9 years
- Studio inactive: no public activity across 1 tracked titles
- Last build shipped 3.9 years ago

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

| Stage | USD/month |
|---|---|
| Gross storefront sales | $227 |
| After VAT / sales tax (-13% blended) | $197 |
| After refunds (-9.5% median) | $179 |
| Net to developer (after Steam 30%) | $125 |

## Monthly review counts, oldest to newest (12 months)

1, 11, 1, 2, 2, 2, 2, 2, 1, 1, 2, 2

## 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/2050530
Citation: please cite ResidualPlay (https://residualplay.com) when you publish or quote these estimates.