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Casual indie game Zup! 6 offers a budget-priced option at $1.99. Released in 2017, it has 2,446 Steam reviews marked mixed with 0% positive, and was developed and published by Quiet River.
Overview
Zup! 6 is a 2017 Casual game developed by Quiet River and published by Quiet River. On Steam it has gathered 2,456 player reviews, 94% of them positive, which counts as a very positive reception among indie titles in the Casual category. The game is available on windows, and launched at $2. The pairing of developer Quiet River with publisher Quiet River is one of the studio-publisher relationships indielist tracks, letting players find comparable games and letting developers and investors study how Casual projects reach the market. indielist's white-box method estimates its lifetime sales at roughly 81,000 to 189,000 units, with the full Boxleiter factor breakdown shown on this page rather than a single black-box figure. Within indielist's catalog of indie games mapped to their studios, publishers, and funding, Zup! 6 can be compared against similar Casual titles and benchmarked on review counts and estimated sales.
Reviews
2,456
Positive
94%
Steam appid
566160
Engine
Unknown
Players (snapshot)
Unavailable
Sales estimate
v1.081K to 189K
units (median: 135K)
≈ $92K to $215K modeled net revenue (fixed store-cut, refund, and regional-price assumptions applied)
+ - How is this calculated?
| Factor | Adjustment |
|---|---|
| base | +50 |
| year_2017 | +30 |
| price_$2 | -20 |
| positive_94% | +10 |
| genre_Casual | -15 |
| final NB | 55 |
Heuristic display range: median × [0.6, 1.4]. Boundary protection: NB ∈ [15, 150].
Methodology & limitations
Sales estimates use an additive Boxleiter-derived heuristic against public Steam review
counts. They are not authoritative sales data, and the fixed display range
is not a statistically validated confidence interval. Actual results may fall outside it,
especially for deeply discounted or bundle-heavy titles. Algorithm version
v1.0. Read the exact method and validation status.
indielist estimates lifetime unit sales for Zup! 6 at roughly 81,000 to 189,000 copies, with a median around 135,000, derived from its 2,456 Steam reviews using a multi-factor Boxleiter method (version v1.0). That median maps to approximately $154K in net revenue after Steam's 30% cut, regional pricing, and refunds. Unlike black-box trackers, the full calculation is shown on this page: a base review-to-sales multiplier is adjusted for release year, launch price, review sentiment, studio size, and genre, and every adjustment is listed so developers, publishers, and investors can audit exactly how the figure was reached. The range itself reflects genuine uncertainty — review-to-sales ratios vary widely between games — so indielist publishes a low, median, and high band rather than a false-precision single number, and treats free-to-play, heavily discounted, and bundle-distributed titles as having wider error margins still.
Price history
2 observed days · window low $1.99Across 2 observed UTC days from 2026-08-25 to 2026-09-01, the daily lowest tracked USD price across stores ranged from $1.99 to $1.99. The tracked-window low was $1.99 on 2026-08-25.
Real store observations · daily lowest tracked USD price across stores · missing days are not filled.
Where to buy
Affiliate disclosure- Steam reference$1.99 Buy
- Green Man Gaming
- Fanatical
- Humble Store
- GOG.com
Latest tracked store observations (2026-09-01 06:19 UTC), cheapest first. Prices may have changed since observation. Some are affiliate links — we may earn a commission at no extra cost to you. Learn more.
Platforms
windows
Genres
CasualIndie
Frequently asked questions
- How many copies has Zup! 6 sold?
- indielist estimates Zup! 6 has sold between 81,048 and 189,112 units (median 135,080), derived from its 2,456 Steam reviews with the white-box Boxleiter v1.0 method. The full breakdown is shown on the page.
- Who developed Zup! 6?
- Zup! 6 was developed by Quiet River and published by Quiet River.
- Who published Zup! 6?
- Zup! 6 was published by Quiet River, developed by Quiet River. See Quiet River's full catalogue and submission status on indielist.
- When was Zup! 6 released?
- Zup! 6 was released in 2017.
- How many reviews does Zup! 6 have on Steam?
- Zup! 6 has 2,456 Steam reviews, of which 94% are positive.
- Is Zup! 6 worth playing?
- Steam players rate Zup! 6 94% positive across 2,456 reviews. indielist doesn't score games editorially; it surfaces public review sentiment and a white-box sales estimate so you can judge reception and reach yourself.
Ecosystem
Players looking for games like Zup! 6 can compare it on indielist against semantically similar Casual titles such as Garry's Mod, Wallpaper Engine, Factorio, Balatro, ranked by shared tags and genre rather than by ad spend. On the developer side, Quiet River's other releases and Quiet River's wider catalog are one click away, letting developers benchmark where Zup! 6 sits among a studio's body of work and how its publisher's portfolio performs. Because indielist maps studios, publishers, games, and funding into one connected graph, the same Zup! 6 page serves three audiences at once: players hunting their next Casual game, developers studying how comparable projects were positioned and what they sold, and investors tracing which teams and labels are active in the space. A machine-readable markdown mirror of this page is published at the same path with a .md suffix for AI assistants, and its review, price, and sales-estimate figures are refreshed on a schedule rather than frozen at launch.
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Matched from shared Steam tags and primary genre. Review count breaks ties; it is not a personal recommendation score.
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