Lightmatter
game
•Updated Oct 2026SteamIndie Games

Lightmatter

byTunnel Vision Games

Lightmatter turns one lethal rule, that shadows kill, into a tight and inventive puzzle campaign, and David Bateson's venomous CEO keeps it funny. It is short, it borrows heavily from Portal, and its late platforming wobbles, but at its best it is one of the smartest first-person puzzlers of its generation.

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Where it ranks in Adventure

Scores 7.9 against a category average of 8.5 — below the Adventure average, ranking 482 of 580 Adventure games we've reviewed.

Scores

Score breakdown

How we weighted the criteria

Design
8.5/10
Innovation
7.5/10
Value
8/10
Utility
7.5/10

Our strongest category here is Design (8.5/10); the weakest is Innovation (7.5/10).

Price
$2.99
one-time or subscription
Released
Jan 15, 2020
Platform
Steam
Developer
Tunnel Vision Games
Publisher
Aspyr
Metacritic
73 / 100

More Steam / PC app reviewsMore Indie Games ranked by score

Quick summary

Lightmatter (Steam) — scored 7.9: Lightmatter turns one lethal rule, that shadows kill, into a tight and inventive puzzle campaign, and David Bateson's venomous CEO keeps it funny. It ...

Pros

  • **"Shadows kill" is a strong core rule** that changes how you read every space
  • **David Bateson's Virgil** is sharp, funny and carries the story
  • **Steadily escalating mechanics** keep the puzzles fresh

Cons

  • **Openly derivative of Portal** in structure and in its narrator-driven humor
  • **Late platforming sections** test execution more than intellect
  • **Short campaign** that drops some ideas before fully exploring them

Verdict

Is Lightmatter worth it?

Lightmatter is not original in its structure, and it never claims to be. Test chambers, a sarcastic voice on the intercom and a first-person puzzle campaign through a corporate facility: you have played this shape before. What Tunnel Vision Games added is a mechanic strong enough to make that shape feel new again. When darkness is the hazard, every lamp is a lifeline and every room a new problem, and the best puzzles in Lightmatter are as clever as anything else in the genre.

Its flaws are real but limited. The late platforming fumbles the momentum, the campaign ends before its ideas are used up, and the Portal comparisons are earned rather than lazy. The studio's closure also gives the game an unintended poignancy: a story about the human cost of ambition, made by a team that did not survive its launch year.

The 94% Steam rating is closer to the truth than the 73 on Metacritic. Lightmatter is a confident, focused and often brilliant puzzle game whose worst crime is clearly loving its influences. Buy it, turn the lights down, and keep to the bright side.

Pros

  • "Shadows kill" is a strong core rule that changes how you read every space
  • David Bateson's Virgil is sharp, funny and carries the story
  • Steadily escalating mechanics keep the puzzles fresh
  • Story and mechanics fit together, with themes of progress and its costs

Cons

  • Openly derivative of Portal in structure and in its narrator-driven humor
  • Late platforming sections test execution more than intellect
  • Short campaign that drops some ideas before fully exploring them
  • No post-launch support, since the studio closed in August 2020

Pricing: $2.99

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What stands out

Key features

  1. Shadows Kill: Any unlit surface is instant death. That one rule shapes every room, every route and every decision you make.
  2. Light Manipulation Toolkit: You move lamps, redirect beams, place portable light sources and ride moving platforms to build safe paths through each chamber.
  3. Escalating Mechanics: New tools and twists keep arriving across the campaign, so the challenge moves from spatial reasoning toward timing-heavy lateral thinking.
  4. Virgil, Voiced by David Bateson: A narrator who talks constantly and is often very funny, and who carries the story's themes of ambition, sacrifice and the human cost of progress.
  5. Industrial Atmosphere: Detailed facility interiors with dramatic, moody lighting. Here the lighting is the gameplay, not just decoration.

Full review

Lightmatter in depth

Bottom Line: Lightmatter turns one lethal rule, that shadows kill, into a tight and inventive puzzle campaign, and David Bateson's venomous CEO keeps it funny. It is short, it borrows heavily from Portal, and its late platforming wobbles, but at its best it is one of the smartest first-person puzzlers of its generation.

The Core Loop: Reading Rooms Like Light Diagrams

Lightmatter's best trick is that it changes how you look at a space. In most first-person games, a room is geometry: walls, floors, ledges. Here, a room is a lighting diagram. You enter a chamber and stop reading the walkways. You start reading the pools of light, the edges of shadows, and the gaps between them that you cannot cross.

The loop is clean. You survey the room, find the light sources you can control, work out where the shadows will fall when you move them, and build a lit route to the exit. Solving it gives you the click every good puzzle game depends on, the moment the fog lifts and the solution looks obvious in hindsight.

What lifts the design above "Portal with a flashlight" is that light is both your tool and your terrain. In Portal, a portal is a tool you aim at terrain. In Lightmatter, moving a lamp changes the terrain itself. Carry a light source forward and the safe ground moves with you. Put it down in the wrong place and you may have cut off your own way back. Puzzles become about sequencing, not just placement, and the best rooms in the game use that well.

Escalation and Pacing

Tunnel Vision keeps adding to its vocabulary at a steady pace. Early rooms teach the basics: stand in the light, move the lamp, cross the gap. Later chambers bring in beam redirection, portable sources and moving platforms, and they stack these systems so that solutions need both lateral thinking and careful timing.

That last part is where the game is at its most uneven. When timing serves the puzzle, like knowing exactly when a platform will carry its light across a gap, it adds welcome tension. When timing turns into a test of execution, like a run of platforming where you know the answer but keep missing the jump, the game loses what makes it good. Several late sections drift into that second category. Dying instantly is fine when it teaches you something. It is just irritating when it punishes a jump you already understood. These late platforming stretches are the most common complaint from players, and it is a fair one.

The difficulty curve is otherwise well judged. The game rarely leaves you stuck for long without a hint in the room's layout, and it does not overstay its welcome. If anything, it finishes too soon. The campaign runs several hours, and some of its newer mechanics are introduced and then dropped before they get a full set of variations. You can see more puzzle ideas in the design than the game had room to explore.

Virgil and the Narrative

Any first-person puzzle game with a voice on the intercom will be compared to GLaDOS. Lightmatter knows this and accepts the comparison. Virgil is not a homicidal AI. He is a human executive, vain and defensive, giving a product launch to someone he would clearly prefer were not there. That small change matters. GLaDOS was funny because she was alien. Virgil is funny because you have met him: in a keynote, in an all-hands, in a founder's open letter.

Bateson plays him with a dry, clipped arrogance that gets a lot out of material that could have fallen flat in the hands of a weaker actor. His commentary is the main reason the game feels like an adventure rather than a series of test chambers. Underneath the jokes, the story builds toward real questions about sacrifice, ambition and what progress costs the people who pay for it. It is not subtle, and the themes sometimes come across as stated rather than earned. Still, the narrative is tied directly to the core mechanic. A game about the price of a new energy source, in which darkness literally kills you, is a sound idea.

Onboarding and Friction

The onboarding is excellent. The central rule needs no tutorial text, because your first death explains it. The facility's layout points you in the right direction without constant prompts. The main friction comes from instant-death resets. A miscalculation sends you back to a checkpoint, and while checkpoints are generally fair, the stop-start rhythm can drag on longer puzzles where only the final step was wrong.

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Top in Adventure

How Lightmatter ranks among our 580 published Adventure reviews.

RankNameOur scorePlatformsPrice
#1MinecraftScores 1.9 higher than Lightmatter · Not on Steam9.8iOS, Android, Nintendo Switch$6.99
#2Baldur's Gate 3Scores 1.8 higher than Lightmatter9.7Steam$59.99
#2Divinity: Original Sin 2Scores 1.8 higher than Lightmatter9.7iOS, Steam, Nintendo Switch$24.99
#482LightmatterThis review7.9Steam$2.99

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FAQ

Common questions

Is Lightmatter worth it?

Lightmatter is not original in its structure, and it never claims to be. Our experts scored Lightmatter 7.9 out of 10 — recommended.

Why does Lightmatter score 7.9 out of 10?

With a score of 7.9 out of 10, Lightmatter lands in our recommended band. Design is its strongest category at 8.5 out of 10. Innovation is the weakest at 7.5.

What do our experts like most about Lightmatter?

"Shadows kill" is a strong core rule that changes how you read every space. David Bateson's Virgil is sharp, funny and carries the story.

What do our experts say is Lightmatter's biggest weakness?

Openly derivative of Portal in structure and in its narrator-driven humor. Late platforming sections test execution more than intellect.

About this review

How we scored Lightmatter

Lightmatter was scored on Design, Innovation, Value and Utility — each from 1 to 10, with the same rubric as every other game in its category — for an overall 7.9. Research and drafting follow Rankeno's fixed editorial rules; the rubric, the checks before publishing and the decision to publish are ours. Published Oct 1, 2026.

Editorial disclaimer The reviews and scores on this site are based on our editorial team's independent analysis and personal opinions. While we strive for objectivity, gaming experiences can be subjective. We are not compensated by developers for these scores.

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7.9LightmatterSteam