Million Depth

A million floors, three timelines, and a girl named Moma

Million Depth is the latest release from Cyber Space Biotope, a Japanese studio published by PLAYISM, released 11 November 2025 for Windows. Players control Moma, who descends into a million-floor-deep underground abyss in search of a friend she believes is somewhere in its depths, armed with a device called a "biotope jammer" that freezes time around her for as long as she herself remains motionless. That single mechanic reshapes everything about combat: rather than reacting to bullet-hell patterns in real time, players stop, study an unfolding threat, and plan a precise sequence of movements and attacks before committing to them, all while managing weapons and shields that steadily degrade and must be repaired or replaced from scavenged parts. Structurally, the game unfolds across three distinct eras, the present, a hundred years later, and a thousand years into the future, with decisions made in earlier timelines rippling forward to reshape events, relationships and even Moma's own fate in the timelines that follow.

A combat idea reviewers call genuinely new

The single most consistent thread running through Million Depth's review corpus is enthusiasm for how fresh its central mechanic feels. Reviewers repeatedly and specifically describe the time-freeze combat system as one of the most inventive ideas they've encountered in the roguelike genre in years, with one detailed review calling it simply "the most unique gameplay mechanic in recent memory" and crediting the design with building many additional hours of mechanics on top of that core idea without it running dry. Multiple reviewers draw a direct, specific comparison to SUPERHOT for how the game ties time's passage to the player's own movement, while extending that comparison further by praising how naturally the mechanic removes the pressure of fast reflexes without making combat feel passive or slow. The narrative draws equally specific, repeated praise, with several reviewers explicitly invoking Steins;Gate and its Steins;Gate 0 follow-up as the clearest touchstone for Million Depth's branching, consequence-driven timeline structure, describing genuine satisfaction in piecing together how choices in one era echo forward into the next. Presentation earns its own specific credit throughout the corpus, with reviewers praising true pixel-art character work, striking full-screen illustrations, and a soundtrack more than one reviewer says they purchased separately after finishing the game specifically to keep listening to it.

A final timeline several reviewers say turns unfair

Set against that praise, the single most consistent and detailed complaint in Million Depth's review base concerns a difficulty spike late in the game. Multiple reviewers, including several who otherwise rate the game highly, describe the final of the three timelines as a significant and unwelcome shift in balance, with one detailed review citing enemy damage roughly 1.5 times higher, attack cooldowns roughly halved, and enemy health around 2.5 times higher than in earlier timelines, compounded by a system where losing "Grace points" during a difficult fight strips away perks and further weakens the player's subsequent rewards, creating what that reviewer describes as a vicious, self-reinforcing cycle. That same reviewer, who otherwise enjoyed roughly eleven hours with the game including its demo, specifically frames this late spike as the reason they ultimately can't recommend it despite enjoying nearly everything that came before. A separate, more measured review corroborates the pattern without going as far, describing "difficulty modifiers" intended to increase challenge in roguelike runs as failing to meaningfully add difficulty compared to the timeline-driven spike itself, suggesting the game's late-game tuning may be an intentional but under-communicated design choice rather than a bug.

A roguelike layer some reviewers found thinner than the rest of the package

A further, smaller but specific and detailed thread of complaints concerns Million Depth's roguelike systems rather than its core combat idea. One detailed review reports reaching the game's true ending on hard difficulty without dying, using the same build, gold swords with stacked attack and defense, in every run, arguing the game never genuinely forced them to adapt to what they found along the way, a criticism that cuts directly against one of the roguelike genre's defining expectations. That same review describes a specific, exploitable strategy involving the game's wandering merchant, where overpaying for cheap items repeatedly builds enough rapport to unlock steep discounts, effectively generating unlimited in-game value. A related, independently repeated complaint concerns the weapon-crafting system's reliance on randomised part availability, with one detailed review arguing the limited, RNG-gated selection of components pushes players toward functional optimisation over genuine creative expression, despite crafting being one of the game's most consistently praised systems overall.

A story that leaves its own mysteries unresolved

A final, recurring thread concerns narrative completeness. Multiple reviewers who otherwise praise Million Depth's Steins;Gate-flavoured mystery specifically note that the story leaves real, unanswered questions even after clearing every timeline, with one detailed review describing "plot holes" and a structure that leans too heavily on players filling in gaps themselves rather than resolving them directly. Several reviewers frame this less as a flaw than as an opening for future content, explicitly hoping for a sequel, expansion or further update to flesh out the world's remaining mysteries, a sentiment that reads as consistent with the game's own subsequent history of post-launch content updates expanding on its systems.

Value

At NZ$24.99, Million Depth sits at a fair price for a roguelite reviewers commonly report finishing in the 8-to-12-hour range for a full clear across all three timelines, with a genuinely novel combat system and a mystery-driven narrative most of the review base considers well worth that time investment. The Very Positive score, 667 positive against 46 negative across 713 reviews, reflects a review base won over by an inventive, well-executed central mechanic and a story with real ambition, tempered by a detailed minority whose specific complaints about a punishing final-timeline difficulty spike and a comparatively thin roguelike layer are worth weighing seriously before buying. For fans of narrative-driven action games looking for something that genuinely doesn't play like anything else on the market, Million Depth is a strong, distinctive recommendation.