Island Market Simulator

Introduction

Island Market Simulator, released 3 September 2026 by Zentium Studio, puts players in charge of a small market stall on a tropical island and asks them to grow it into a full trading empire, farming crops, raising livestock, and managing production chains together with friends as seasons and festivals shift what customers want to buy. The game entered Early Access in March 2026 before reaching its full 1.0 release six months later, both within the same calendar year, and it sits Mostly Positive with a modest sample of 153 reviews. Reading widely through that sample reveals genuine appeal in the underlying economic loop, particularly when played in co-op, sitting uncomfortably alongside a specific, well-corroborated cluster of serious complaints that several of the game's own supporters raise without prompting.

A genuinely appealing co-op economy loop

The clearest, most consistent praise across this sample concerns the core act of building an economy from a single small stall into something bigger. Reviewers describe real satisfaction in managing production chains, raising livestock, and adapting to seasonal shifts in customer demand, and several specifically frame the game as a successful expansion of the familiar market-sim formula into a broader, more varied simulation rather than a narrow single-shop loop. That appreciation intensifies sharply when co-op enters the picture: reviewers describe genuine joy building an island trading empire together with friends, with more than one comparing the cooperative appeal to other survival and crafting titles built around shared, long-term projects. One reviewer frames the experience directly as still fun "somehow" after extensive shared play, which reads as a real, if slightly bemused, endorsement of the underlying loop's staying power.

A specific, serious originality allegation

Set directly against that praise, this review found a specific and pointed complaint that can't responsibly be left out of any honest account of this sample: at least one detailed, highly-upvoted reviewer states plainly that Island Market Simulator is a direct copy of Old Market Simulator, a similarly-structured title that released roughly two years earlier. This review was not able to independently verify the extent or nature of that resemblance, and reports the claim here as a documented, well-endorsed position within the Steam review sample rather than an established fact. Given how much weight the accusation carries within the reviews themselves — it's one of the more heavily upvoted individual comments in the entire sample — prospective buyers who care about originality specifically should weigh it directly rather than assume the game's broader positive standing settles the question.

"Should have been fixed in Early Access"

The single most heavily endorsed critical comment in this sample, carrying nearly seven hundred upvotes, states directly that the game remains a buggy mess with issues that should have been resolved during its Early Access period rather than persisting after a full 1.0 release. That sentiment is echoed by other, less heavily-upvoted reviewers describing the current build as a "hot buggy mess" beneath a market sim they otherwise believe has real potential. This review found the same specific pattern here that turned up in this lane's research on other titles that transitioned from Early Access to 1.0 within a single year: a version number change that isn't matched by a correspondingly finished, stable underlying build.

Specific, reproducible bugs

Beyond that general dissatisfaction, this review found several concrete, specific and reproducible problems reported independently by multiple reviewers. Restarting an in-game day is reported to cause a loss of accumulated money and items, with at least one detailed account describing repeated failed attempts — three or four restarts — before giving up on a session entirely rather than risking further losses. Separately, at least one detailed reviewer reports the in-game day does not actually stop when a player's store is closed, directly contradicting the developer's own recent patch notes, which specifically claimed this exact issue had already been fixed. The same reviewer separately notes promised daily "gifts" failing to appear at the dock as described, and specifically requests that the hireable apprentice character be given the ability to handle deliveries, in order to make solo play a more viable option alongside the game's co-op-first design.

Co-op's own connectivity problems

It's worth naming directly that co-op, despite drawing this sample's warmest praise when it works, also draws its own specific connectivity complaints. At least one reviewer describes spending twenty minutes trying and failing to get their spouse and friends into a shared game, with nobody able to successfully load into anyone else's session — and that reviewer explicitly states they never managed to get honest, uninterrupted gameplay time as a result. That's a particularly serious problem for a game whose most distinctive, most praised feature is specifically its cooperative play; a co-op economy sim that a meaningful share of prospective buyers can't reliably get into together undermines its own core pitch in a way that's arguably more damaging than an isolated single-player bug would be.

Performance is inconsistent across this sample

Performance reports in this sample pull in two different directions, and this review treats that inconsistency itself as informative. One reviewer reports 20 FPS on every graphical setting, describing the game as unplayable on their hardware regardless of adjustment. A separate reviewer, writing in Russian, specifically credits recent optimisation work with making the game playable even on comparatively weak hardware. Read together, these two accounts suggest performance may vary significantly depending on specific hardware configuration or may have shifted meaningfully across different patches within a short window, rather than reflecting a single, stable, universally experienced framerate. Either way, prospective buyers on older or budget hardware should treat performance as a genuine open question rather than a settled point in the game's favour.

Weighing genuine appeal against a genuinely rough launch

Taken as a whole, this review reads Island Market Simulator as a game with real, demonstrated appeal in its core economic and cooperative loop, let down by a launch that a meaningful share of its own supporters describe as unfinished. The originality allegation against Old Market Simulator, the day-restart data loss, the co-op joining failures, and the patch-notes-contradicted timer bug are each specific and independently corroborated rather than vague dissatisfaction, and together they paint a picture closer to an Early Access build still settling into its final form than a genuinely complete 1.0 release. That the game did formally enter Early Access and exit it within the same year doesn't excuse the gap between the two states; if anything, the six-month window makes the persistence of these specific, previously-known-category issues more notable rather than less.

Final Verdict

Island Market Simulator offers a genuinely appealing co-op trading and production loop, built on a familiar market-sim foundation reviewers say has been meaningfully expanded with livestock, farming, and seasonal variety. What holds this score down is a specific, well-corroborated cluster of problems too serious to wave away: a direct plagiarism allegation from a widely-endorsed reviewer, a save-breaking day-restart bug, co-op lobby-joining failures that undercut the game's central selling point, and a timer bug the developer's own patch notes claim doesn't exist. Worth a look at this price for patient co-op fans willing to treat it as a still-developing project; everyone else should wait for a build that more consistently matches its own patch notes.