Compare Monster Lab Simulator prices across trusted key stores and find the best deal. Developed by Round 3 Studios. Published by Round 3 Studios. Released on 2/13/2026. Available on PC. Genres: Casual, Indie, Simulation, Strategy, Early Access.

Push through a first hour that explains almost nothing and you get a creature-breeding optimization loop with real theorycrafting teeth. Early Access rough edges included.

My first hour with Monster Lab Simulator was mostly wrong clicks. I brewed essences I did not need, crossbred two creatures whose traits cancelled each other out, and sent the result into the arena to be politely dismantled. The tutorial does not hold your hand so much as gesture at the door and wish you luck. That is the friction, and it is real: the game front-loads vocabulary (essences, traits, lineage, arena grades) without front-loading the reasons any of it matters. The question for most buyers is whether hour two pays back hour one. For me it did, right around the point where I stopped treating the lab as a toy and started treating it as a supply chain. If you read tooltips as a hobby, you will get there faster than I did. If you want a creature collector that teaches itself, this is not the one. Underneath the confusion is a tight optimization loop. You generate essences, feed them into crossbreeding to push traits in a direction you choose, build out a roster, then send that roster to the arena, which grades your homework in the bluntest way available. Win or lose, the result is data. The arena is the feedback mechanism the whole game is built around, and it works because losses are legible. You can usually point at the trait combination that failed and correct it in the next generation instead of shrugging at bad luck. That is the difference between a slot machine and a systems game, and Round 3 Studios landed on the right side of it. Roster building matters more than raw stat inflation: a lineup of three specialists tends to outperform four generalists, and working out why is most of the fun. Here is the part I want to defend, because it is the part that scares people off. A game with a theorycrafting loop this exposed sounds like a commitment you have to research on a wiki before you are allowed to enjoy it. It is not, and the accessibility work is the reason. Save Anytime means you can stop mid-experiment and come back with a plan. Nothing here demands timed input, so there is no reflex tax stacked on top of the planning tax. Adjustable text size, subtitle options and colour alternatives are all present, which matters more than usual in a game where the entire skill ceiling lives inside dense tooltips. Practically, the beginner path is simple: run three or four deliberately bad breeds early, on purpose, and read exactly what the arena tells you. You will internalise the trait interactions in roughly ninety minutes of play, and from there the game opens up. Treat the first evening as tuition rather than progress and the curve flattens hard. What disappoints. This is Early Access and it plays like it. The mid-game stretch, after you have solved the core trait puzzles but before the next unlock tier arrives, sags noticeably, and the arena opposition starts repeating patterns you have already countered, so the AI shifts from teacher to formality. Content depth is the honest weak point: the systems can support far more variety than the current roster asks of them. The interface is functional and no more, which stings when your main verb is comparing numbers across menus. Nothing in the feature list points to Steam Workshop support either, so there is no mod scene to paper over the thin spots, and for a game this systems-driven that is the gap I feel most. The Mostly Positive rating tracks with my experience: 74 percent across nearly six hundred players is the signature of a good loop wrapped in unfinished packaging, not a broken game. Buy it if you enjoy the planning more than the payoff, if a spreadsheet of trait synergies sounds like a decent Saturday, and if you can accept that the roadmap has to deliver for this to stay interesting past the thirty hour mark. Skip it if you want a cozy monster raiser with a story attached, because the arena does not care about your favourites. It cares about your math. Diego, Scout Team

Monster Lab Simulator

Monster Lab Simulator

Feb 13, 2026Round 3 Studios
GamerScout Says

Push through a first hour that explains almost nothing and you get a creature-breeding optimization loop with real theorycrafting teeth. Early Access rough edges included.

PC
Best Price Available
€11.77
at Gamivo
Lowest tracked: €11.80
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GamerScout Verdict

Best for spreadsheet-minded breeders who want an optimization puzzle rather than a cozy pet sim, and can tolerate Early Access gaps.

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GamivoBest price
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€11.77
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€12.78
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StandardEurope (EU)Steam KeyKey
€12.99
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Price History

Lowest tracked
€11.801 Sept 2026
Current best
€11.77
Lowest since we started tracking
Keyshops
€11.68€12.09€12.49€12.9031 Aug1 Sept3 Sept4 Sept5 Sept
Tracking prices since 31 Aug 2026
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Screenshots & Media

About Monster Lab Simulator

My first hour with Monster Lab Simulator was mostly wrong clicks. I brewed essences I did not need, crossbred two creatures whose traits cancelled each other out, and sent the result into the arena to be politely dismantled. The tutorial does not hold your hand so much as gesture at the door and wish you luck. That is the friction, and it is real: the game front-loads vocabulary (essences, traits, lineage, arena grades) without front-loading the reasons any of it matters. The question for most buyers is whether hour two pays back hour one. For me it did, right around the point where I stopped treating the lab as a toy and started treating it as a supply chain. If you read tooltips as a hobby, you will get there faster than I did. If you want a creature collector that teaches itself, this is not the one. Underneath the confusion is a tight optimization loop. You generate essences, feed them into crossbreeding to push traits in a direction you choose, build out a roster, then send that roster to the arena, which grades your homework in the bluntest way available. Win or lose, the result is data. The arena is the feedback mechanism the whole game is built around, and it works because losses are legible. You can usually point at the trait combination that failed and correct it in the next generation instead of shrugging at bad luck. That is the difference between a slot machine and a systems game, and Round 3 Studios landed on the right side of it. Roster building matters more than raw stat inflation: a lineup of three specialists tends to outperform four generalists, and working out why is most of the fun. Here is the part I want to defend, because it is the part that scares people off. A game with a theorycrafting loop this exposed sounds like a commitment you have to research on a wiki before you are allowed to enjoy it. It is not, and the accessibility work is the reason. Save Anytime means you can stop mid-experiment and come back with a plan. Nothing here demands timed input, so there is no reflex tax stacked on top of the planning tax. Adjustable text size, subtitle options and colour alternatives are all present, which matters more than usual in a game where the entire skill ceiling lives inside dense tooltips. Practically, the beginner path is simple: run three or four deliberately bad breeds early, on purpose, and read exactly what the arena tells you. You will internalise the trait interactions in roughly ninety minutes of play, and from there the game opens up. Treat the first evening as tuition rather than progress and the curve flattens hard. What disappoints. This is Early Access and it plays like it. The mid-game stretch, after you have solved the core trait puzzles but before the next unlock tier arrives, sags noticeably, and the arena opposition starts repeating patterns you have already countered, so the AI shifts from teacher to formality. Content depth is the honest weak point: the systems can support far more variety than the current roster asks of them. The interface is functional and no more, which stings when your main verb is comparing numbers across menus. Nothing in the feature list points to Steam Workshop support either, so there is no mod scene to paper over the thin spots, and for a game this systems-driven that is the gap I feel most. The Mostly Positive rating tracks with my experience: 74 percent across nearly six hundred players is the signature of a good loop wrapped in unfinished packaging, not a broken game. Buy it if you enjoy the planning more than the payoff, if a spreadsheet of trait synergies sounds like a decent Saturday, and if you can accept that the roadmap has to deliver for this to stay interesting past the thirty hour mark. Skip it if you want a cozy monster raiser with a story attached, because the arena does not care about your favourites. It cares about your math.

Diego
Diego · Scout Team

Strategy & simulation

Tags

auto-admittedCreature CollectorLab ManagementGenetic CrossbreedingArena BattlerTheorycraftingRoster BuildingOptimization LoopAccessibility OptionsSave AnytimeSteep Learning CurveMin-MaxingStat ManagementPause and PlanSandbox ExperimentationSolo ProgressionTrial and Error DesignSystems-Driven

System Requirements

Minimum

OS
Windows (64-bit) 10
Processor
Intel Core i5-2500 @ 3,3 GHz (4 CPUs)
Memory
8 GB RAM
Graphics
NVidia GeForce GTX 1050
DirectX
Version 11
Storage
4…

Recommended

OS
Windows (64-bit) 10
Processor
Intel Core i7-11700K or AMD Ryzen 7 5800X
Memory
8 GB RAM
Graphics
NVIDIA GeForce GTX 1660S, 6 GB or AMD Radeon RX 5…

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Community Discussion

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Reviews & Ratings

Steam
74%(580)

Game Info

Developer
Round 3 Studios
Publisher
Round 3 Studios
Release Date
Feb 13, 2026

Features

Single-playerSteam AchievementsAdjustable Text SizeCamera ComfortColor AlternativesCustom Volume ControlsPlayable without Timed InputSave Anytime+4 more

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Frequently asked questions about Monster Lab Simulator

How much does Monster Lab Simulator cost?

As of 5 September 2026, the cheapest in-stock offer for Monster Lab Simulator is €11.77 at Gamivo, out of 3 live offers we track across verified key stores. Prices change daily — the table on this page is refreshed continuously.

Where can I buy Monster Lab Simulator cheapest?

The lowest in-stock price we track for Monster Lab Simulator is €11.77 at Gamivo (5 September 2026). We compare 3 live offers from verified key stores — the full table with every store and its trust score is on this page.

What platforms is Monster Lab Simulator available on?

Monster Lab Simulator is available on PC.

When was Monster Lab Simulator released?

Monster Lab Simulator was released on 13 February 2026.

Who developed Monster Lab Simulator?

Monster Lab Simulator was developed by Round 3 Studios.