

Deductum
nonpop · August 5, 2025 · Puzzle, Casual, Logic, Education, Tutorial
Buy Deductum from Steam at $4.99 — the cheapest of 1 store we compare.
Where to buy Deductum — official stores
Deductum price by region
Deductum costs £4.29 in the United Kingdom, $4.99 in the United States, €4.99 in Europe (EUR), $4.99 in Georgia (USD), CA$6.49 in Canada, NZ$7.39 in New Zealand, A$7.50 in Australia, R$16.99 in Brazil and zł22.99 in Poland right now.
| Region | Best price | Official store | Key shop | Stores |
|---|---|---|---|---|
| £4.29 | £4.29 | — | 1 | |
| $4.99 | $4.99 | — | 1 | |
| €4.99 | €4.99 | — | 1 | |
| $4.99 | $4.99 | — | 1 | |
| CA$6.49 | CA$6.49 | — | 1 | |
| NZ$7.39 | NZ$7.39 | — | 1 | |
| A$7.50 | A$7.50 | — | 1 | |
| R$16.99 | R$16.99 | — | 1 | |
| zł22.99 | zł22.99 | — | 1 |
Each row is a real price from that region's own stores, not a currency conversion, so the figures are not directly comparable. Switch regions in the header to shop the one you buy in.
Screenshots
About Deductum
Deductum challenges you to prove logical conclusions from given premises using the fundamental rules of formal logic, one step at a time across 111 increasingly complex problems. It stands out as a distraction-free puzzle experience with no timers or guessing required, where every solution relies purely on logical reasoning and a sandbox mode lets you test any claim you want.
- Simple controls. No timers. No distractions. Just logic.
- 111 problems to solve, including classic theorems like De Morgan's Laws and the Law of the Excluded Middle
- Sandbox mode: enter any claim (with proposition symbols A–H) and see if you can prove it!
Deductum — game info
- Platforms
- Windows, Linux / SteamOS
- Player modes
- Single-player
- PC Game Pass
- Not included
What Steam players say
Recent verbatim reviews from Steam — separate from playze.io community reviews below.
Deductum is a polished and thoughtfully designed logic puzzle game that excels for players with some background in boolean algebra or formal logic, but struggles significantly with accessibility for newcomers. Common complaints center on unclear tutorial explanations, bugs with tooltip placement, insufficient guidance on what the solution animations demonstrate, and a steep learning curve that leaves average players confused and stuck.
I really want to like this game. It's incredibly polished and snappy, but I am SO lost. I went through the entire tutorial and spent a hot second really trying to understand what each direction meant but I just don't get it. I think it would appeal to more people if the tutorial wasn't written in a highly sophisticated way because it makes me feel stupid. Even though I'm giving this a poor review i'm positive fixing a few things could make it much more enjoyable for any average joe.5 found this helpful
I can't even finish the conjoiner tutorial. I keep getting stuck on the next to last problem. I've been looking for a game like this for so long, mainly because I'm so bad at this kind of thing. It feels like I've tried every possible combination of answers and I am still getting stuck in a loop. Can you please put a gameplay video on youtube so we can have a reference2 found this helpful
I have bought this game as I think I would like it but in the introductory stages it appears to have a bug which displays the tool tips for the tutorial in the wrong place on the screen. Sometimes this means at least some of the text for the tutorial isn't on the screen at all. If I want to see the tutorial text where it should be I have to restart the application and continue from the same point I was. It also disables useful buttons. When it's showing a tutorial tip the button to return to the menu is disabled. Once you have the right answer it shows a rapid animation with the logic you have created but it doesn't explain what the animation is supposed to be telling you and it passes by very quickly. I am not certain of the purpose of all the blocks you are given. P ^ Q therefore P seems like a tautology to me. If you know P is true and you know Q is true then you know P is true isn't telling you anything new. I don't understand why it doesn't finish the level sometimes. If I see A ^ B therefore A then I can click its equivalent P ^ Q therefore P. So, why doesn't it end there? It gives me a new turn now with A ^ ? so I have to fill in and duplicate the premise before it so …2 found this helpful
Good fun, putting the familiar logical challenge into a new interface is enough to leave you humorously confused. Very well polished. I would advise you pick it up if you already have some limited experience with boolean algebra, or if you are unfamiliar with the work but find high difficulty acceptable.2 found this helpful
I'd been looking for this exact sort of game for a couple of years. I took a logic class in college and wanted a refresher. This game exceeded my expectations. It is not only a thoughtful training in semantic logic but a beautiful experience all around. Good music, graphics, even a custom font. I mean, they didn't have to but I'm thrilled that they went through all of the effort. The whole experience is polished and engaging. It's also reaching the difficulty of a logic primer college class, so if you're going to get into it, have patience with yourself. One of my personal favorites.1 found this helpful
an amazing game and really interesting. feels a bit like Turing Complete in the best way. the only change i would make is add a reset button, but besides from that, perfect little puzzle game!1 found this helpful
Community reviews
0 reviews
Sign in to write a review.
No reviews yet. Be the first to review this game.
More like Deductum
News
XboxMinecraft Dungeons 2 Deluxe Edition: skip it, play on Game Pass
The Minecraft Dungeons 2 Deluxe Edition asks you to pre-order two unannounced DLC packs for a game Game Pass already gives you. What it contains, and why the upgrade can wait.
Sep 30, 2026
PCIs DayZ worth it? A straight answer before you buy
Is DayZ worth it? Twelve years on it is still the genre's least forgiving game. What you are buying, who it suits, and what our 97-day price record says about the timing.
Sep 30, 2026
PCTransport Fever 3 price: which edition to buy on launch day
Transport Fever 3 is out today. The Transport Fever 3 price splits three ways, the loyalty discount has a fortnight-long fuse, and our record shows what the older game really costs.
Sep 29, 2026
PCNo Man's Sky price: how low it gets and when to buy
The No Man's Sky price has come a long way down since 2016, and the game is on PC Game Pass too. Our tracked 12-month low, the regional key gap, and what to actually pay.
Sep 29, 2026
DealsSekiro cheap: what our price record shows, and what to avoid
Search Sekiro cheap and the results are keyshop listings, not a store discount. Our three-month price record explains the gap, and why so few live offers changes the advice.
Sep 28, 2026
FreebiesSystem Shock 2 Remaster free on Epic from 1 October
System Shock 2 Remaster free on Epic from 1 to 8 October, alongside BURIED STARS. Our price record shows why its floor has not moved in three months, and why waiting beats buying this week.
Sep 28, 2026
PCDead Island 2 cheap: which edition, and what the price does
Dead Island 2 cheap used to mean under a dollar. Our price record shows the floor has roughly doubled since September - here is which edition to buy, and the one that is a trap.
Sep 27, 2026
DealsSteam Autumn Sale 2026: the games that cannot be discounted
The Steam Autumn Sale 2026 runs 1-8 October, but Valve's own rules bar every September release from it. Which games are locked out, and what our record says about the two biggest.
Sep 27, 2026
PCTekken 8 ღირს თუ არა: 91 ქულა და შერეული შეფასება
Tekken 8 ღირს თუ არა, როცა კრიტიკოსებს 91 ქულა აქვთ დაწერილი, მოთამაშეებს კი „შერეული"? ფასი, ონლაინის მდგომარეობა და უკეთესი ალტერნატივა.
Sep 24, 2026
DealsStellaris იაფად: ოცდახუთი დამატება და ერთი გამოსავალი
Stellaris იაფად ყიდვა საბაზისო თამაშის შემთხვევაში მარტივია. ძვირი დამატებებია — და მათთვის არსებობს ვარიანტი, რომელსაც ბევრი ვერ ამჩნევს.
Sep 24, 2026
PCARK ფასი: Evolved თუ Ascended — რომელი ვიყიდოთ
ARK ფასი ორი სხვადასხვა თამაშის ფასია. რომელი ჯობია ქართული სიიდან, სად არიან მოთამაშეები და რატომ არ ღირს ახალ ვერსიაზე გადახტომა.
Sep 24, 2026
DealsCivilization 6 იაფად: რომელი დამატება ღირს მართლა
Civilization 6 იაფად ყიდვა მარტივია — საბაზისო თამაში იაფია და იაფად რჩება. რთული ის არის, რომ ცხრამეტი დამატებიდან სწორი აირჩიოთ.
Sep 24, 2026
FreebiesCS2 უფასოდ: რა ღირს სინამდვილეში Prime
CS2 უფასოდ ითამაშება საქართველოდანაც და ეს დემო არაა. ფული მხოლოდ Prime-ს სჭირდება — აი, რას იძლევა ის და ვის ღირს.
Sep 24, 2026
PCCuphead ღირს თუ არა: სირთულე, DLC და ორზე თამაში
Cuphead ღირს თუ არა: ექვსივე ქართულ მაღაზიაში ერთი ფასია, მეგობარს კი ასლი საერთოდ არ სჭირდება. სირთულე, ერთადერთი დამატება და როდის ვიყიდოთ.
Sep 23, 2026
DealsRimWorld იაფად: ბაზა, ხუთი დამატება და სწორი რიგი
RimWorld იაფად ყიდვა დამატებების რიგზეა დამოკიდებული, არა ფასდაკლების ლოდინზე. რომელი ხუთიდან ღირს ჯერ და რომელ მაღაზიას აქვს ფასდაკლება.
Sep 23, 2026
PCPhasmophobia ფასი: ოთხი ასლი და ერთი მაღაზია
Phasmophobia ფასი ქართულ სიაში მხოლოდ ერთ მაღაზიაში ჩანს, თამაში კი ოთხზეა გათვლილი. რატომ ღირს ფასდაკლების დალოდება და რა გჭირდებათ დასაწყებად.
Sep 23, 2026Top games right now
All rankings →- 1Counter-Strike 2Free
- 2Dota 2Free
- 3PUBG: BATTLEGROUNDSFree
- 4Grand Theft Auto V Legacy—
- 5Terraria$2.20
- 6Rust$25.62
- 7Team Fortress 2Free
- 8Black Myth: Wukong$35.70
- 9HELLDIVERS™ 2$30.57
- 10ELDEN RING$52.89
- 11Apex Legends™Free
- 12Left 4 Dead 2$9.99
- 13Stardew Valley$14.73
- 14Wallpaper Engine$3.99
- 15Euro Truck Simulator 2$4.99
- 16Dead by Daylight$10.40
- 17Red Dead Redemption 2$10.54
- 18Baldur's Gate 3$41.99
- 19Phasmophobia$18.29
- 20War ThunderFree
- 21Call of Duty®—
- 22ARK: Survival Evolved$14.24
- 23Among Us$3.03
- 24The Forest$19.99
Buy at Steam 










