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Syntheses generated by statistical aggregation of player reviews.

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Steam specs (min / recommended)

Minimum: Système d'exploitation et processeur 64 bits nécessaires Système d'exploitation *: Windows Vista / 7 / 8 / 10 Processeur : 2.0 GHz Mémoire vive : 4 GB de mémoire Graphiques : 1366 x 768 DirectX : Version 11 Espace disque : 600 MB d'espace disque disponible

Recommended: Système d'exploitation et processeur 64 bits nécessaires Système d'exploitation *: Windows Vista / 7 / 8 / 10 Processeur : 2.0 GHz Mémoire vive : 4 GB de mémoire Graphiques : 1920 x 1080 DirectX : Version 11 Espace disque : 600 MB d'espace disque disponible

Opus Magnum

Safe bet
⚔️ Compare View on Steam ↗
Released December 7, 2017
sample: 492 reviews posted after launch (180 AI-classified)
96/100
Player Score — positive reviews weighted by volume · Steam history: 97 % · 7,108 reviews (« Overwhelmingly Positive »)
19,50€🛒 Compare on Instant Gamingaffiliate link

Puzzles dominate the experience: 156 positive mentions out of 166. The title has gathered over 7,100 reviews with a 97% overall rating, and post‑release sentiment remains high at 96% positive among 492 sampled reviews.

What it's about: Opus Magnum est le dernier jeu de puzzle ouvert créé par Zachtronics, le créateur de SpaceChem, Infinifactory et SHENZHEN I/O. Grâce au moteur de transmutation, l'outil le plus sophistiqué en ingénierie alchimique, développez et assemblez des machines pour créer des potions, poisons et bien plus !

In-game

Screenshot Opus MagnumScreenshot Opus MagnumScreenshot Opus MagnumScreenshot Opus MagnumScreenshot Opus Magnum
« I'm here because of Goodbye Galaxy and I think this video is the best advertisement for the game https://www.youtube.com/watch?v=W_Ekun0WDIk »
👍 anonymous review · 37 h played82
« One of the best games I've ever played. I spent countless hours optimizing and enjoyed every aspect of this game. »
👍 anonymous review · 1430 h played2221
« Even though my brain can't comprehend the puzzles in this game, it's fun to slave over them for hours just for the solution to be so bad you slave over them for another hour. Great game »
👍 anonymous review · 9 h played1
« Zach Barth's magnum opus and the best starting point for anyone who thinks they may be interested in Zachtronics games »
👍 anonymous review · 8 h played1
« Je ne sais pas qui a eu l'idée de développer ce jeu fabuleux, mais il est clairement plus malin que moi. »
👍 anonymous review · 11 h played
« bonjour je voudrai recrée une sauvegarde mais cest impossibe ,imposible de demander a steam ou au dev donc pousse rouge mais bon jeu sinon »
👎 anonymous review · 51 h played
« Seemingly made for a 24" 1080p screen tops, with no UI scaling of any sorts. On modern screens, text is therefor basically unreadable and you have to play at 1080p, which even with integer scaling, looks weirdly blurry on a 4K screen. »
👎 anonymous review · 3 h played
« I'm constantly having problems with errors with this game. In the updates, not in the game. »
👎 anonymous review · 20 h played
« le jeu est très bien, demande de la logique, on peu garder des animations gif de ses créations Le petit moins, je suis pas assez malin... »
👍 anonymous review · 21 h played
« bon puzzle (al)chimique, visuellement satisfaisant. Comptez une centaine d'heure »
👍 anonymous review · 262 h played

In players' words

« I'm here because of Goodbye Galaxy and I think this video is the best advertisement for the game https://www.youtube.com/watch?v=W_Ekun0WDIk »
👍 anonymous review · 37 h played82
« bonjour je voudrai recrée une sauvegarde mais cest impossibe ,imposible de demander a steam ou au dev donc pousse rouge mais bon jeu sinon »
👎 anonymous review · 51 h played
« One of the best games I've ever played. I spent countless hours optimizing and enjoyed every aspect of this game. »
👍 anonymous review · 1430 h played2221
« Seemingly made for a 24" 1080p screen tops, with no UI scaling of any sorts. On modern screens, text is therefor basically unreadable and you have to play at 1080p, which even with integer scaling, looks weirdly blurry on a 4K screen. »
👎 anonymous review · 3 h played
« Even though my brain can't comprehend the puzzles in this game, it's fun to slave over them for hours just for the solution to be so bad you slave over them for another hour. Great game »
👍 anonymous review · 9 h played1
« I'm constantly having problems with errors with this game. In the updates, not in the game. »
👎 anonymous review · 20 h played
« Zach Barth's magnum opus and the best starting point for anyone who thinks they may be interested in Zachtronics games »
👍 anonymous review · 8 h played1
« le jeu est très bien, demande de la logique, on peu garder des animations gif de ses créations Le petit moins, je suis pas assez malin... »
👍 anonymous review · 21 h played
« Je ne sais pas qui a eu l'idée de développer ce jeu fabuleux, mais il est clairement plus malin que moi. »
👍 anonymous review · 11 h played
« bon puzzle (al)chimique, visuellement satisfaisant. Comptez une centaine d'heure »
👍 anonymous review · 262 h played

Anonymized excerpts from public Steam reviews — picked among those most voted "helpful" by the community.

What players say, by aspect

Positive Mixed Negative
Gameplay
94 % pos · n=166
Story / writing
87 % pos · n=23
Graphics / art
100 % pos · n=13
Interface / UX
27 % pos · n=11
Content / longevity
100 % pos · n=9
Audio / music
100 % pos · n=6
Performance
50 % pos · n=2
Stability / bugs
0 % pos · n=2
Multiplayer
50 % pos · n=2
Detailed data (table)
AspectMentionsPositiveMixedNegative
Gameplay16615646
Story / writing232003
Graphics / art131300
Interface / UX11317
Content / longevity9900
Audio / music6600
Performance2101
Stability / bugs2002
Multiplayer2101

Positive reviews by playtime

🎮 Players who like it have spent 24 h on median; those who dislike it: 5.7 h.

<2h
62 % (n=8)
2-10h
90 % (n=79)
10-25h
98 % (n=176)
>25h
98 % (n=229)

Fixed or still broken? Sentiment over time

➡️ Stable reception over time
Mar 2026 : 96% positive96MarApr 2026 : 93% positive93AprMay 2026 : 98% positive98MayJun 2026 : 95% positive95JunJul 2026 : 96% positive96Jul

% of positive reviews per month (months with ≥ 15 sample reviews).

100% completion difficulty ("platinum")

0,1 % Hardcore

of players have unlocked the rarest achievement — the upper bound of those who "100%'d" it. 6 achievements in total; the median achievement is unlocked by 14 % of players.

What creators say (YouTube)

No indexed video for this game yet.

See Opus Magnum videos on YouTube →

This game on Twitch

Strengths

  • Gameplay is widely praised: 156 positive mentions out of 166
  • Graphics and audio are universally liked: 13 positive mentions out of 13 for graphics and 6 out of 6 for audio
  • The game delivers strong satisfaction and addictiveness: 13 mentions of satisfaction and 8 of addictif

Weaknesses

  • Performance issues are rarely mentioned but when they appear, they're negative: 1 negative mention out of 2
  • UI problems affect some players: 7 negative mentions out of 11
  • Bugs, though infrequent, are consistently negative: 2 negative mentions out of 2

Who is it for?

Fans of intricate puzzle‑solving, especially those who enjoy Zachtronics‑style challenges, will find Opus Magnum highly engaging. Players who appreciate creative freedom and the satisfaction of building efficient machines will also thrive.

Is Opus Magnum worth it in 2026?

Yes, without reservation for most players: 97% of 7,108 Steam reviews are positive (player score 96/100). Most-praised strength: Gameplay is widely praised. Current price: 19,50€.

Verdict

Opus Magnum’s deep, rewarding puzzle design and polish in graphics and sound make it a standout indie simulation. Minor drawbacks in performance, UI, and occasional bugs are outweighed by its addictive, creative gameplay, securing its status as a must‑play for puzzle enthusiasts.

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Opus Magnum: 96/100 by players — Gamer Reviews

Most frequent keywords

optimisation (17)puzzles (17)satisfaction (13)puzzle (9)accessible (8)addictif (8)créativité (8)zachtronics (7)liberté (7)automatisation (6)défi (6)rejouabilité (5)

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