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Action-focused UnderMine launched in 2020 from thorium, with the same slug listed for developer and publisher. On Steam it has 9,792 reviews at 90% positive, rated Very Positive, and an initial price of $19.99.
Overview
UnderMine is a 2020 Action game developed by Thorium and published by Thorium. On Steam it has gathered 9,283 player reviews, 90% of them positive, which counts as a very positive reception among indie titles in the Action category. The game is available on linux, mac, windows, and launched at $20. The pairing of developer Thorium with publisher Thorium is one of the studio-publisher relationships indielist tracks, letting players find comparable games and letting developers and investors study how Action projects reach the market. indielist's white-box method estimates its lifetime sales at roughly 418,000 to 975,000 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, UnderMine can be compared against similar Action titles and benchmarked on review counts and estimated sales.
Reviews
9,283
Positive
90%
Steam appid
656350
Engine
Unknown
Players (snapshot)
Unavailable
Sales estimate
v1.0418K to 975K
units (median: 696K)
≈ $4.8M to $11.1M modeled net revenue (fixed store-cut, refund, and regional-price assumptions applied)
+ - How is this calculated?
| Factor | Adjustment |
|---|---|
| base | +50 |
| year_2020 | +15 |
| price_$20 | 0 |
| positive_90% | +10 |
| 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 UnderMine at roughly 418,000 to 975,000 copies, with a median around 696,000, derived from its 9,283 Steam reviews using a multi-factor Boxleiter method (version v1.0). That median maps to approximately $7.9M 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
50 observed days · window low $4.99Across 50 observed UTC days from 2026-06-10 to 2026-09-04, the daily lowest tracked USD price across stores ranged from $4.99 to $19.99. The tracked-window low was $4.99 on 2026-06-26.
Real store observations · daily lowest tracked USD price across stores · missing days are not filled.
Where to buy
Affiliate disclosureLatest tracked store observations (2026-09-04 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
linuxmacwindows
Frequently asked questions
- How many copies has UnderMine sold?
- indielist estimates UnderMine has sold between 417,735 and 974,715 units (median 696,225), derived from its 9,283 Steam reviews with the white-box Boxleiter v1.0 method. The full breakdown is shown on the page.
- Who developed UnderMine?
- UnderMine was developed by Thorium and published by Thorium.
- Who published UnderMine?
- UnderMine was published by Thorium, developed by Thorium. See Thorium's full catalogue and submission status on indielist.
- When was UnderMine released?
- UnderMine was released in 2020.
- How many reviews does UnderMine have on Steam?
- UnderMine has 9,283 Steam reviews, of which 90% are positive.
- Is UnderMine worth playing?
- Steam players rate UnderMine 90% positive across 9,283 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 UnderMine can compare it on indielist against semantically similar Action titles such as Terraria, Rust, Phasmophobia, The Forest, ranked by shared tags and genre rather than by ad spend. On the developer side, Thorium's other releases and Thorium's wider catalog are one click away, letting developers benchmark where UnderMine 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 UnderMine page serves three audiences at once: players hunting their next Action 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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