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A budget indie game entry from synthetic-domain, Mainframe Defenders launched in 2020 at $5.99. Its Steam listing shows 707 reviews with a mixed label and 0% positive in the provided data, with synthetic-domain also listed as publisher.
Overview
Mainframe Defenders is a 2020 Indie game developed by Synthetic Domain and published by Synthetic Domain. On Steam it has gathered 716 player reviews, 88% of them positive, which counts as a very positive reception among indie titles in the Indie category. The game is available on linux, windows, and launched at $6. The pairing of developer Synthetic Domain with publisher Synthetic Domain 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 30,000 to 70,000 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, Mainframe Defenders can be compared against similar Indie titles and benchmarked on review counts and estimated sales.
Reviews
716
Positive
88%
Steam appid
1184810
Engine
Unknown
Players (snapshot)
Unavailable
Sales estimate
v1.030K to 70K
units (median: 50K)
≈ $103K to $240K modeled net revenue (fixed store-cut, refund, and regional-price assumptions applied)
+ - How is this calculated?
| Factor | Adjustment |
|---|---|
| base | +50 |
| year_2020 | +15 |
| price_$6 | -5 |
| positive_88% | +10 |
| final NB | 70 |
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 Mainframe Defenders at roughly 30,000 to 70,000 copies, with a median around 50,000, derived from its 716 Steam reviews using a multi-factor Boxleiter method (version v1.0). That median maps to approximately $171K 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
8 observed days · window low $5.99Across 8 observed UTC days from 2026-07-15 to 2026-07-22, the daily lowest tracked USD price across stores ranged from $5.99 to $5.99. The tracked-window low was $5.99 on 2026-07-15.
Real store observations · daily lowest tracked USD price across stores · missing days are not filled.
Where to buy
Affiliate disclosureLatest tracked store observations (2026-07-22 08:33 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
linuxwindows
Frequently asked questions
- How many copies has Mainframe Defenders sold?
- indielist estimates Mainframe Defenders has sold between 30,072 and 70,168 units (median 50,120), derived from its 716 Steam reviews with the white-box Boxleiter v1.0 method. The full breakdown is shown on the page.
- Who developed Mainframe Defenders?
- Mainframe Defenders was developed by Synthetic Domain and published by Synthetic Domain.
- Who published Mainframe Defenders?
- Mainframe Defenders was published by Synthetic Domain, developed by Synthetic Domain. See Synthetic Domain's full catalogue and submission status on indielist.
- When was Mainframe Defenders released?
- Mainframe Defenders was released in 2020.
- How many reviews does Mainframe Defenders have on Steam?
- Mainframe Defenders has 716 Steam reviews, of which 88% are positive.
- Is Mainframe Defenders worth playing?
- Steam players rate Mainframe Defenders 88% positive across 716 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 Mainframe Defenders 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, Synthetic Domain's other releases and Synthetic Domain's wider catalog are one click away, letting developers benchmark where Mainframe Defenders 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 Mainframe Defenders 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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Matched from shared Steam tags and primary genre. Review count breaks ties; it is not a personal recommendation score.
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