# ECHO

> Probable indie-scope game profile, served by indielist (https://indielist.games). Sales estimate uses a transparent Boxleiter-derived heuristic; its fixed display range is not a statistically validated confidence interval.

## Snapshot
- **Indie scope**: probable
- **Classification reason**: steam_store_genre:Indie
- **Classification evidence**: https://store.steampowered.com/app/551770/
- **Primary genre**: Action
- **Release year**: 2017
- **Release date**: Sep 19, 2017
- **Platforms**: windows
- **Genres**: Action, Adventure, Indie
- **Launch price**: $24.99 USD
- **Steam reviews**: 1,540
- **Positive review %**: 77%
- **Steam app**: https://store.steampowered.com/app/551770

## Developer
- **Studio**: [ULTRA ULTRA](https://indielist.games/studios/ultra-ultra)

## Publisher
- **Name**: [ULTRA ULTRA](https://indielist.games/publishers/ultra-ultra)

## Sales estimate (white-box, version v1.0)

- **Units (median)**: 130,900 (range 78,540 – 183,260)
- **Net revenue (median)**: $1,868,504 USD
- **Boxleiter NB used**: 85
- **Algorithm version**: v1.0

### NB breakdown
- `base`: +50
- `year_2017`: +30
- `price_$25`: +5
- `positive_77%`: 0

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Source: indielist (https://indielist.games/games/echo-551770)
Estimates are not official sales data. Methodology: docs/sales-algorithm.md. Always verify large numbers with official sources before citing.