The Game Census
Opus Magnum cover art

Opus Magnum

Zachtronics · 2017-12-07

SteamGOGMicrosoft Store

IndieSimulation

Modes: Single player · Perspectives: Bird view / Isometric

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!

Opus Magnum is a $19.99 Indie and Simulation game released in 2017, with an estimated 200,000 .. 500,000 owners and an Overwhelmingly Positive review sentiment (97% of 7,206 reviews).

109
playing now
97%
positive of 7.3k reviews
Overwhelmingly Positive
steam's rating (official)
200,000–500,000
owners (SteamSpy est.)
92/100
critic score (3 outlets, IGDB)
87/100
IGDB user rating (36 ratings)
1
Nexus mods (19 downloads)
27h
to beat · rushed 16h · completionist 44h
gold
deck/linux tier (ProtonDB)
Playable
Steam Deck (Valve)
SteamOS: Playable
$19.99
steam price (US)

109 players in-game as of 2026-10-14 12:00 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.

Trailer

Opus Magnum trailer thumbnail

Opus Magnum, by Zachtronics

≈645,318 YouTube results for this game's trailer search

Health check

Healthy
  • · 109 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 3% of 49,602 Indie games in the census by review count.

Health tier since 2026-08-27

Estimated sales: 183k–439k copies

Review-multiple estimate from 7,314 total reviews — how this is computed.

Current store prices

GOG$19.99
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 41 of 74 observed days · $13.20 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

368852026-09-15 13:00 — 368 players2026-09-16 21:00 — 254 players2026-09-18 05:00 — 183 players2026-09-19 12:00 — 238 players2026-09-20 20:00 — 240 players2026-09-22 04:00 — 144 players2026-09-23 11:00 — 137 players2026-09-24 19:00 — 197 players2026-09-26 02:00 — 150 players2026-09-27 10:00 — 137 players2026-09-28 17:00 — 159 players2026-09-30 01:00 — 126 players2026-10-01 08:00 — 85 players2026-10-02 16:00 — 227 players2026-10-03 23:00 — 254 players2026-10-05 07:00 — 158 players2026-10-06 15:00 — 243 players2026-10-07 22:00 — 233 players2026-10-09 06:00 — 134 players2026-10-10 13:00 — 251 players2026-10-11 21:00 — 239 players2026-10-13 05:00 — 134 players2026-10-14 12:00 — 109 players
Concurrent players, hourly average, last 30 days (census samples).
50533Oct 2017Aug 2026Oct 2017 — avg 378 · peak 842Jan 2018 — avg 235 · peak 590Apr 2018 — avg 65 · peak 137Jul 2018 — avg 116 · peak 291Oct 2018 — avg 220 · peak 853Jan 2019 — avg 107 · peak 359Apr 2019 — avg 39 · peak 80Jul 2019 — avg 68 · peak 171Oct 2019 — avg 42 · peak 84Jan 2020 — avg 80 · peak 189Apr 2020 — avg 166 · peak 357Jul 2020 — avg 125 · peak 263Oct 2020 — avg 62 · peak 175Jan 2021 — avg 96 · peak 198Apr 2021 — avg 59 · peak 98Jul 2021 — avg 87 · peak 187Oct 2021 — avg 72 · peak 190Jan 2022 — avg 83 · peak 152Apr 2022 — avg 56 · peak 130Jul 2022 — avg 115 · peak 240Oct 2022 — avg 51 · peak 92Jan 2023 — avg 63 · peak 123Apr 2023 — avg 54 · peak 155Jul 2023 — avg 66 · peak 129Oct 2023 — avg 54 · peak 140Jan 2024 — avg 85 · peak 190Apr 2024 — avg 42 · peak 83Jul 2024 — avg 68 · peak 136Oct 2024 — avg 54 · peak 159Jan 2025 — avg 61 · peak 123Apr 2025 — avg 43 · peak 78Jul 2025 — avg 161 · peak 500Oct 2025 — avg 76 · peak 204Jan 2026 — avg 71 · peak 155Apr 2026 — avg 222 · peak 467Jul 2026 — avg 252 · peak 609Aug 2026 — avg 130 · peak 221
Monthly average players (source: steamcharts.com) — history via steamcharts.com; live census sampling since Aug 2026.

Price history

$19.99$6.792017-10-202026-10-142017-10-20 — 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 $19.992026-09-04 — best price $9.992026-09-19 — best price $19.992026-10-04 — best price $9.992026-10-14 — best price $19.99
Lowest recorded price across tracked stores, per day (census snapshots).

Attention

202552026-05-29 — 85 pageviews2026-06-02 — 94 pageviews2026-06-06 — 55 pageviews2026-06-10 — 64 pageviews2026-06-14 — 70 pageviews2026-06-18 — 122 pageviews2026-06-22 — 68 pageviews2026-06-26 — 104 pageviews2026-06-30 — 77 pageviews2026-07-04 — 71 pageviews2026-07-08 — 202 pageviews2026-07-12 — 153 pageviews2026-07-16 — 78 pageviews2026-07-20 — 98 pageviews2026-07-24 — 97 pageviews2026-07-28 — 163 pageviews2026-08-01 — 66 pageviews2026-08-05 — 72 pageviews2026-08-09 — 83 pageviews2026-08-13 — 59 pageviews2026-08-17 — 64 pageviews2026-08-21 — 145 pageviews2026-08-25 — 88 pageviews2026-08-29 — 91 pageviews2026-09-02 — 89 pageviews2026-09-06 — 106 pageviews2026-09-10 — 94 pageviews2026-09-14 — 164 pageviews2026-09-18 — 106 pageviews2026-09-22 — 82 pageviews2026-09-26 — 67 pageviews2026-09-30 — 79 pageviews2026-10-04 — 82 pageviews2026-10-07 — 99 pageviews
Daily Wikipedia pageviews (attention proxy, census-recorded).

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…

Post-launch support: 1 DLC released, first 2026-03-17 (Steam store data)

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.

Where its players are

Share of Steam reviews by language (top languages measured) — a proxy for where the player base lives.

Player tags

2DIndieLogicCasualPuzzleSandboxBuildingHex GridDifficultSteampunk

Census log

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

Recent updates

Players also track

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Similarity via IGDB.

Official site ↗Wikipedia ↗