The Game Census
Opus Magnum cover art

Opus Magnum

Zachtronics · 2017-12-07

SteamGOGMicrosoft Store

IndieSimulation

Modes: Single player

Releases: Dec 07, 2017 (Linux), Dec 07, 2017 (Mac), Dec 07, 2017 (PC (Microsoft Windows)), Jun 09, 2019 (Xbox One)

Opus Magnum is the latest open-ended puzzle game from Zachtronics, the creators of SpaceChem, Infinifactory, and SHENZHEN I/O. Design and build machines that assemble potions, poisons, and more using the alchemical engineer’s most advanced tool: the transmutation engine!

140
playing now
97%
positive of 7.2k reviews
Overwhelmingly Positive
steam rating
200,000–500,000
owners (SteamSpy est.)
92/100
critic score (3 outlets, IGDB)
87/100
IGDB user rating (36 ratings)
27h
to beat · rushed 16h · completionist 44h
gold
deck/linux tier (ProtonDB)
$19.99
steam price (US)

140 players in-game as of 2026-08-30 02:00 UTC (census sample)

Opus Magnum is a puzzle-based programming game developed by Zachtronics. It was released for Microsoft Windows, Linux, and Mac in December 2017, following about two months of early access. In the game, the player must assemble a series of machines using various tools and program them to complete alchemy-related tasks. The player can advance with any working solution to each problem, but is challenged through leaderboards to produce a machine that does the task in the shortest time, with the lowest cost of materials or the smallest occupied area. Opus Magnum is based on The Codex of Alchemical Engineering, one of the earliest Flash games made by Zach Barth prior to establishing Zachtronics.

Health check

Healthy
  • · 140 players in-game at the last census sample.
  • · 790 reviews in the last 8 weeks (~99/week).
  • · Review velocity up 136% vs the prior 8 weeks.
  • · Top 7% of 18,104 Indie games in the census by review count.

Health tier since 2026-08-27

Estimated sales: 180k–431k copies

Review-multiple estimate from 7,180 total reviews — how this is computed.

Current store prices

GOG$9.99-50%
lowest across shops (ITAD)$9.99-50%
Microsoft Store$19.99

Deal snapshots via CheapShark, refreshed daily.

All-time low: $6.79 at Fanatical (2021-04-21) · bundled 2×via IsThereAnyDeal

12-month high $19.99 · on sale 22 of 37 observed days · $3.20 above the all-time low (census price snapshots)

Review momentum

PositiveNegative
27727720182026Week of 2018-01-01: 82 positiveWeek of 2018-01-01: 2 negativeWeek of 2018-02-01: 29 positiveWeek of 2018-02-01: 1 negativeWeek of 2018-03-01: 33 positiveWeek of 2018-03-01: 1 negativeWeek of 2018-04-01: 20 positiveWeek of 2018-04-01: 2 negativeWeek of 2018-05-01: 18 positiveWeek of 2018-05-01: 1 negativeWeek of 2018-06-01: 47 positiveWeek of 2018-06-01: 3 negativeWeek of 2018-07-01: 46 positiveWeek of 2018-07-01: 1 negativeWeek of 2018-08-01: 23 positiveWeek of 2018-08-01: 1 negativeWeek of 2018-09-01: 17 positiveWeek of 2018-09-01: 1 negativeWeek of 2018-10-01: 65 positiveWeek of 2018-10-01: 4 negativeWeek of 2018-11-01: 277 positiveWeek of 2018-11-01: 2 negativeWeek of 2018-12-01: 40 positiveWeek of 2018-12-01: 1 negativeWeek of 2019-01-01: 38 positiveWeek of 2019-02-01: 25 positiveWeek of 2019-02-01: 3 negativeWeek of 2019-03-01: 26 positiveWeek of 2019-03-01: 1 negativeWeek of 2019-04-01: 17 positiveWeek of 2019-05-01: 11 positiveWeek of 2019-06-01: 64 positiveWeek of 2019-07-01: 72 positiveWeek of 2019-07-01: 2 negativeWeek of 2019-08-01: 37 positiveWeek of 2019-08-01: 2 negativeWeek of 2019-09-01: 16 positiveWeek of 2019-10-01: 18 positiveWeek of 2019-10-01: 1 negativeWeek of 2019-11-01: 109 positiveWeek of 2019-11-01: 1 negativeWeek of 2019-12-01: 113 positiveWeek of 2019-12-01: 3 negativeWeek of 2020-01-01: 85 positiveWeek of 2020-01-01: 2 negativeWeek of 2020-02-01: 60 positiveWeek of 2020-03-01: 128 positiveWeek of 2020-03-01: 8 negativeWeek of 2020-04-01: 65 positiveWeek of 2020-04-01: 2 negativeWeek of 2020-05-01: 45 positiveWeek of 2020-06-01: 65 positiveWeek of 2020-06-01: 1 negativeWeek of 2020-07-01: 92 positiveWeek of 2020-07-01: 2 negativeWeek of 2020-08-01: 46 positiveWeek of 2020-08-01: 1 negativeWeek of 2020-09-01: 38 positiveWeek of 2020-09-01: 2 negativeWeek of 2020-10-01: 29 positiveWeek of 2020-10-01: 1 negativeWeek of 2020-11-01: 43 positiveWeek of 2020-11-01: 4 negativeWeek of 2020-12-01: 69 positiveWeek of 2020-12-01: 1 negativeWeek of 2021-01-01: 63 positiveWeek of 2021-01-01: 1 negativeWeek of 2021-02-01: 161 positiveWeek of 2021-02-01: 5 negativeWeek of 2021-03-01: 36 positiveWeek of 2021-03-01: 2 negativeWeek of 2021-04-01: 36 positiveWeek of 2021-05-01: 29 positiveWeek of 2021-05-01: 4 negativeWeek of 2021-06-01: 53 positiveWeek of 2021-07-01: 54 positiveWeek of 2021-07-01: 2 negativeWeek of 2021-08-01: 25 positiveWeek of 2021-08-01: 2 negativeWeek of 2021-09-01: 26 positiveWeek of 2021-10-01: 53 positiveWeek of 2021-10-01: 2 negativeWeek of 2021-11-01: 48 positiveWeek of 2021-11-01: 3 negativeWeek of 2021-12-01: 55 positiveWeek of 2022-01-01: 48 positiveWeek of 2022-01-01: 3 negativeWeek of 2022-02-01: 23 positiveWeek of 2022-02-01: 3 negativeWeek of 2022-03-01: 25 positiveWeek of 2022-03-01: 5 negativeWeek of 2022-04-01: 36 positiveWeek of 2022-05-01: 29 positiveWeek of 2022-05-01: 2 negativeWeek of 2022-06-01: 40 positiveWeek of 2022-06-01: 1 negativeWeek of 2022-07-01: 63 positiveWeek of 2022-07-01: 1 negativeWeek of 2022-08-01: 30 positiveWeek of 2022-09-01: 51 positiveWeek of 2022-09-01: 2 negativeWeek of 2022-10-01: 24 positiveWeek of 2022-11-01: 28 positiveWeek of 2022-12-01: 42 positiveWeek of 2022-12-01: 1 negativeWeek of 2023-01-01: 34 positiveWeek of 2023-01-01: 2 negativeWeek of 2023-02-01: 21 positiveWeek of 2023-02-01: 2 negativeWeek of 2023-03-01: 27 positiveWeek of 2023-04-01: 31 positiveWeek of 2023-04-01: 1 negativeWeek of 2023-05-01: 22 positiveWeek of 2023-05-01: 1 negativeWeek of 2023-06-01: 20 positiveWeek of 2023-06-01: 1 negativeWeek of 2023-07-01: 44 positiveWeek of 2023-07-01: 1 negativeWeek of 2023-08-01: 25 positiveWeek of 2023-08-01: 1 negativeWeek of 2023-09-01: 27 positiveWeek of 2023-09-01: 1 negativeWeek of 2023-10-01: 35 positiveWeek of 2023-11-01: 33 positiveWeek of 2023-12-01: 28 positiveWeek of 2024-01-01: 45 positiveWeek of 2024-01-01: 1 negativeWeek of 2024-02-01: 34 positiveWeek of 2024-02-01: 1 negativeWeek of 2024-03-01: 33 positiveWeek of 2024-04-01: 21 positiveWeek of 2024-04-01: 1 negativeWeek of 2024-05-01: 34 positiveWeek of 2024-05-01: 2 negativeWeek of 2024-06-01: 23 positiveWeek of 2024-06-01: 2 negativeWeek of 2024-07-01: 48 positiveWeek of 2024-07-01: 2 negativeWeek of 2024-08-01: 20 positiveWeek of 2024-08-01: 1 negativeWeek of 2024-09-01: 17 positiveWeek of 2024-10-01: 28 positiveWeek of 2024-10-01: 1 negativeWeek of 2024-11-01: 18 positiveWeek of 2024-11-01: 1 negativeWeek of 2024-12-01: 32 positiveWeek of 2025-01-01: 29 positiveWeek of 2025-02-01: 17 positiveWeek of 2025-02-01: 1 negativeWeek of 2025-03-01: 45 positiveWeek of 2025-03-01: 2 negativeWeek of 2025-04-01: 25 positiveWeek of 2025-05-01: 21 positiveWeek of 2025-05-01: 3 negativeWeek of 2025-06-01: 53 positiveWeek of 2025-06-01: 3 negativeWeek of 2025-07-01: 79 positiveWeek of 2025-07-01: 5 negativeWeek of 2025-08-01: 43 positiveWeek of 2025-09-01: 20 positiveWeek of 2025-09-01: 1 negativeWeek of 2025-10-01: 50 positiveWeek of 2025-11-01: 32 positiveWeek of 2025-12-01: 36 positiveWeek of 2025-12-01: 3 negativeWeek of 2026-01-01: 35 positiveWeek of 2026-01-01: 2 negativeWeek of 2026-02-01: 62 positiveWeek of 2026-02-01: 4 negativeWeek of 2026-03-01: 273 positiveWeek of 2026-03-01: 6 negativeWeek of 2026-04-01: 88 positiveWeek of 2026-04-01: 6 negativeWeek of 2026-05-01: 72 positiveWeek of 2026-05-01: 1 negativeWeek of 2026-06-01: 84 positiveWeek of 2026-06-01: 5 negativeWeek of 2026-07-01: 111 positiveWeek of 2026-07-01: 2 negativeWeek of 2026-08-01: 56 positiveWeek of 2026-08-01: 1 negative
Weekly review counts (Steam review histogram). Positive above the line, negative below.

Players online

190742026-08-06 23:00 — 133 players2026-08-07 07:00 — 102 players2026-08-07 15:00 — 162 players2026-08-07 23:00 — 151 players2026-08-08 07:00 — 114 players2026-08-08 15:00 — 171 players2026-08-08 23:00 — 182 players2026-08-09 07:00 — 113 players2026-08-09 15:00 — 169 players2026-08-09 23:00 — 137 players2026-08-10 07:00 — 94 players2026-08-10 16:00 — 135 players2026-08-11 00:00 — 137 players2026-08-11 08:00 — 105 players2026-08-11 16:00 — 128 players2026-08-12 23:00 — 126 players2026-08-14 07:00 — 86 players2026-08-15 15:00 — 125 players2026-08-16 23:00 — 161 players2026-08-18 06:00 — 74 players2026-08-19 14:00 — 125 players2026-08-20 21:00 — 134 players2026-08-22 05:00 — 101 players2026-08-23 12:00 — 138 players2026-08-24 20:00 — 143 players2026-08-26 04:00 — 85 players2026-08-27 11:00 — 103 players2026-08-28 19:00 — 128 players2026-08-30 02:00 — 140 players
Concurrent players, hourly average, last 30 days (census samples).

Price history

$19.99$6.792017-10-202026-08-302017-10-20 — best price $17.992018-03-12 — best price $17.992018-07-05 — best price $19.992018-11-15 — best price $14.992019-01-10 — best price $13.392019-05-01 — best price $13.392019-08-19 — best price $13.392019-12-09 — best price $9.992020-01-24 — best price $9.992020-04-14 — best price $19.992020-08-17 — best price $19.992020-11-27 — best price $9.992021-02-11 — best price $9.992021-05-17 — best price $19.992021-10-27 — best price $9.992022-01-27 — best price $9.992022-05-03 — best price $17.992022-09-13 — best price $9.992022-11-29 — best price $19.992023-02-13 — best price $9.992023-05-05 — best price $9.992023-08-07 — best price $9.992023-11-16 — best price $19.992024-01-25 — best price $9.992024-04-08 — best price $9.992024-06-19 — best price $9.992024-08-26 — best price $9.992024-11-01 — best price $9.992024-12-19 — best price $9.992025-02-17 — best price $9.992025-05-21 — best price $9.992025-08-04 — best price $9.992025-11-25 — best price $9.992026-04-03 — best price $19.992026-08-30 — best price $9.99
Lowest recorded price across tracked stores, per day (census snapshots).

Attention

229532026-05-29 — 85 pageviews2026-06-01 — 90 pageviews2026-06-04 — 76 pageviews2026-06-07 — 75 pageviews2026-06-10 — 64 pageviews2026-06-13 — 122 pageviews2026-06-16 — 72 pageviews2026-06-19 — 90 pageviews2026-06-22 — 68 pageviews2026-06-25 — 71 pageviews2026-06-28 — 78 pageviews2026-07-01 — 73 pageviews2026-07-04 — 71 pageviews2026-07-07 — 229 pageviews2026-07-10 — 133 pageviews2026-07-13 — 142 pageviews2026-07-16 — 78 pageviews2026-07-19 — 113 pageviews2026-07-22 — 156 pageviews2026-07-25 — 115 pageviews2026-07-28 — 163 pageviews2026-07-31 — 90 pageviews2026-08-03 — 82 pageviews2026-08-06 — 91 pageviews2026-08-09 — 83 pageviews2026-08-12 — 70 pageviews2026-08-15 — 83 pageviews2026-08-18 — 72 pageviews2026-08-21 — 145 pageviews2026-08-24 — 110 pageviews2026-08-26 — 80 pageviews
Daily Wikipedia pageviews (attention proxy, census-recorded).

Twitch viewers

102026-08-27 07:33 — 0 viewers2026-08-27 08:34 — 0 viewers2026-08-27 09:33 — 0 viewers2026-08-27 10:34 — 0 viewers2026-08-27 11:34 — 0 viewers2026-08-27 12:34 — 0 viewers2026-08-27 13:34 — 0 viewers2026-08-27 14:34 — 0 viewers2026-08-27 15:34 — 0 viewers2026-08-27 16:34 — 1 viewers2026-08-27 17:34 — 0 viewers
Hourly Twitch viewers (census snapshots).

Completion

6
achievements tracked
50.7%
earned "The Way of the Novice"
7.6%
median achievement earned by

Global achievement rates from Steam.

Details

WindowsmacOSLinuxSingle-playerSteam AchievementsSteam WorkshopSteam CloudSteam LeaderboardsIncludes level editorFamily Sharing1 DLC

13 supported languages: English, French, German, Japanese, Russian, Simplified Chinese, Spanish - Latin America, Korean, Turkish, Ukrainian, Portuguese - Portugal, Czech…

Console footprint

PlatformPlayers trackedCompletionTrophies/achievements
Steam (Steam)8,6391%6
Windows (Xbox)33122%10

Players tracked by Exophase (achievement/trophy trackers) — a sample of the player base, not total sales.

Player tags

2DIndieLogicCasualPuzzleSandboxBuildingHex GridDifficultSteampunk

Census log

Computed from census-recorded observations only — dates are observation dates.

Players also track

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Similarity via IGDB.

Official site ↗Wikipedia ↗