10 Detective Games on Steam Where You Actually Do the Deducing

Features

The best detective games do not ask you to find the culprit. They ask you to prove it — and that single difference is what separates the genre’s classics from a dialogue tree with a trench coat.

Mystery games have a structural problem no other genre has: a mystery is only solvable once. Replay value is gone the moment the player knows the answer, and worse, the player can arrive at the right answer by accident and feel nothing. The games below are organised around how they solve that, because it turns out there are only two real answers.

The two kinds of detective game

Externalised deduction games make you record your conclusions in a system that checks them. You are not asked whether you understand; you are asked to commit. Narrative deduction games have the character do the reasoning and give you the job of gathering what they need. Both work. They are not the same purchase, and most disappointment with the genre comes from buying one while expecting the other.

The canonical solution to the once-solvable problem is Return of the Obra Dinn’s notebook, which only confirms identities and fates once you have three of them correct at the same time. That rule does two things at once: it stops brute-force guessing, because random answers will not triangulate, and it gives you partial credit for partial understanding. Nearly every externalised-deduction game since has borrowed some version of it.

The games

Game	Price	Who does the deducing	Status
Return of the Obra Dinn	Paid	You, verified in threes	Released
No Murders in Grimwick	$6.99	You, against a town that denies it	Released
The Mermaid Mask	Paid	You, locked-room format	Released
The Death Game Report	$3.99	You, by filing a report	Released
Lorelei and the Laser Eyes	Paid	You, puzzle-first	Released
AKIBA LOST	Paid	Character, FMV format	Released
Olga – Episode 1	$7.99	Character, linear mystery	Released
HoloTrials: Case Covered	Free	Character, school investigation	Released
A Night at Moka Efti	Free	Character, unreliable memory	Released
The Last Slava	Not announced	You, by sabotaging loops	Coming soon

The ones that make you commit

Return of the Obra Dinn is still the reference point. You board a ship declared lost at sea in 1802 and reconstruct the fate of every person aboard from frozen moments of death, and the three-at-a-time confirmation rule is the reason it feels like detection rather than clicking.

No Murders in Grimwick moves the obstacle somewhere cleverer. The puzzle is not a hidden culprit but a town insisting there was no murder at its harvest festival, which makes every unhelpful local into evidence instead of a dead end. At $6.99 with 90% positive from 41 reviews, it entered this week’s Steam 250 chart at #44.

The Death Game Report does the most interesting thing with the format: your output is a bureaucratic document. You reconstruct a death game on a remote island from the records the dead left behind and submit a report, so the deduction has to be written down to count. At $3.99 it is the cheapest genuine deduction game on this list.

The Mermaid Mask takes the locked-room form literally — a captain dead beside a cauldron aboard a submarine — from the makers of Tangle Tower and Crow Country. Lorelei and the Laser Eyes is the outlier: a mystery whose clues are mostly puzzles, set in a baroque manor that may be a hotel or a museum.

The ones where the character deduces

AKIBA LOST holds a 99% positive rating on a genre most people assume died a decade ago, the full-motion-video mystery. Olga – Episode 1 is a linear village mystery its own store page calls “spooky cozy”. HoloTrials: Case Covered and A Night at Moka Efti are both free, and Moka Efti builds its whole case around whether you can trust your own character’s memory.

What these games are not good for

Replay. Almost none of these are worth a second run. You will know the answer. Treat the price as the cost of one good evening, which is why the $3.99 and free entries punch above their weight here and why a $40 mystery is a harder recommendation than a $40 roguelike.

Playing tired. Externalised deduction games require you to hold several threads at once and write things down. Obra Dinn and The Death Game Report are close to unplayable as background entertainment, and players who bounce off them usually bounced off the note-taking rather than the story.

Guaranteed fairness. The genre’s recurring failure is a final leap the evidence does not support. Narrative-deduction games are more prone to it, because the character can simply know something you were never shown. If that specifically annoys you, stay on the top half of the table.

Length. Several of these are short and do not hide it. That is a feature at $4 to $7 and a complaint at full price.

Frequently asked questions

What is the best detective game on Steam?

Return of the Obra Dinn remains the most influential, because its notebook only confirms answers in correct groups of three, which forces real deduction instead of guessing. If you want something newer and cheaper, No Murders in Grimwick at $6.99 is the strongest recent entry.

Are there any free detective games on Steam?

Yes. HoloTrials: Case Covered and A Night at Moka Efti are both free. Both are narrative-deduction games, meaning the character reasons and you gather the evidence.

What is the difference between a detective game and a visual novel?

A detective game gives you a way to be wrong. Visual novels present a story you move through; deduction games ask you to commit to a conclusion and tell you whether it holds. Many games sit in both camps, which is why checking for a notebook, accusation or report system is the useful test before buying.

Are detective games worth replaying?

Usually not. The solution does not change, so most of the value is in the first run. Price accordingly and favour the cheap or free entries if you only want one evening.

What is a good short murder mystery game?

The Death Game Report at $3.99 and No Murders in Grimwick at $6.99 are both single-case games you can finish in a sitting or two, and both make you record the solution rather than stumble onto it.

Do you need to take notes to play these games?

For the externalised-deduction half of the list, yes, and the good ones build the notebook into the game so you do not need paper. The narrative-deduction half tracks clues for you.

Sources and citation

No Murders in Grimwick store page, for price, review score and content descriptors
https://store.steampowered.com/app/5198670/
Steam 250 seven-day chart, for chart positions and review counts
https://steam250.com/7day
Analysis of Return of the Obra Dinn’s three-at-a-time confirmation rule
https://filmstories.co.uk/features/exploring-return-of-the-obra-dinns-rule-of-three/

10 Detective Games on Steam Where You Actually Do the Deducing

The two kinds of detective game