Avadon: The Black Fortress
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A budget indie game from Spiderweb Software, Avadon: The Black Fortress launched in 2011 at $9.99. It has 617 Steam reviews with 81% positive, a modest but mostly positive signal for players browsing older self-published indie releases.
Overview
Avadon: The Black Fortress is a 2011 Indie game developed by Spiderweb Software and published by Spiderweb Software. On Steam it has gathered 445 player reviews, 81% of them positive, which counts as a mostly positive reception among indie titles in the Indie category. The game is available on linux, mac, windows, and launched at $10. The pairing of developer Spiderweb Software with publisher Spiderweb Software is one of the studio-publisher relationships indielist tracks, letting players find comparable games and letting developers and investors study how Indie projects reach the market. indielist's white-box method estimates its lifetime sales at roughly 20,000 to 47,000 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, Avadon: The Black Fortress can be compared against similar Indie titles and benchmarked on review counts and estimated sales.
Reviews
445
Positive
81%
Steam appid
112100
Engine
Unknown
Players (snapshot)
Unavailable
Sales estimate
v1.020K to 47K
units (median: 33K)
≈ $114K to $267K modeled net revenue (fixed store-cut, refund, and regional-price assumptions applied)
+ - How is this calculated?
| Factor | Adjustment |
|---|---|
| base | +50 |
| year_2011 | +30 |
| price_$10 | -5 |
| positive_81% | 0 |
| final NB | 75 |
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 Avadon: The Black Fortress at roughly 20,000 to 47,000 copies, with a median around 33,000, derived from its 445 Steam reviews using a multi-factor Boxleiter method (version v1.0). That median maps to approximately $190K 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
14 observed days · window low $2.99Across 14 observed UTC days from 2026-07-15 to 2026-09-02, the daily lowest tracked USD price across stores ranged from $2.99 to $9.99. The tracked-window low was $2.99 on 2026-07-15.
Real store observations · daily lowest tracked USD price across stores · missing days are not filled.
Where to buy
Affiliate disclosure- GOG.com -70%$2.99 Buy
- Steam reference
- Green Man Gaming
- Fanatical
- Humble Store
Latest tracked store observations (2026-09-02 05:53 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
linuxmacwindows
Genres
IndieRPG
Frequently asked questions
- How many copies has Avadon: The Black Fortress sold?
- indielist estimates Avadon: The Black Fortress has sold between 20,025 and 46,725 units (median 33,375), derived from its 445 Steam reviews with the white-box Boxleiter v1.0 method. The full breakdown is shown on the page.
- Who developed Avadon: The Black Fortress?
- Avadon: The Black Fortress was developed by Spiderweb Software and published by Spiderweb Software.
- Who published Avadon: The Black Fortress?
- Avadon: The Black Fortress was published by Spiderweb Software, developed by Spiderweb Software. See Spiderweb Software's full catalogue and submission status on indielist.
- When was Avadon: The Black Fortress released?
- Avadon: The Black Fortress was released in 2011.
- How many reviews does Avadon: The Black Fortress have on Steam?
- Avadon: The Black Fortress has 445 Steam reviews, of which 81% are positive.
- Is Avadon: The Black Fortress worth playing?
- Steam players rate Avadon: The Black Fortress 81% positive across 445 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 Avadon: The Black Fortress can compare it on indielist against semantically similar Indie titles such as Stardew Valley, Euro Truck Simulator 2, Project Zomboid, Undertale, ranked by shared tags and genre rather than by ad spend. On the developer side, Spiderweb Software's other releases and Spiderweb Software's wider catalog are one click away, letting developers benchmark where Avadon: The Black Fortress 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 Avadon: The Black Fortress page serves three audiences at once: players hunting their next Indie 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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