
Mine, build, and explore with Monster Girl companions in this underground sandbox adventure. Uncover lost tech, automate production, and forge bonds with allies as you fight to survive and journey back to the surface.
Modeled estimate, not a reported figure. How we estimate →
Prices
Each in the currency that store quoted — not converted: the gap between two rows is the publisher's pricing, not an exchange rate.
Every market we collect.
Discounts
Every price cut of more than 20% we have observed, in each market that quoted one, with this game's chart position on either side of it. These are episodes, not a model: a sale is one event, and one event cannot tell you what the next one will do.
Reviews, worldwide (the counter carries no country): 0.29/day in the week to Aug 31 → 0.86/day in the week after.
For scale, across Steam · Top Sellers · Brazil over the last 30 days: the 25 chart moves that followed a price cut of more than 20% went a median of 10 places towards #1, and the 2,413 moves with no price cut behind them went 2 away. One store, one chart, one country — it is the only place we have enough observations to say even that.
Prices outside the United States have been collected since 6 August 2026 and chart positions since 19 July 2026, so a cut older than that has no market to compare and a market that joined later has no history yet. Nothing here is converted between currencies.
About
Mine endlessly – Swing your pickaxe or blast entire mineral veins for resources
Explore a vast underground world – Discover secrets of humanity’s downfall
Befriend Monster Girls – Gain allies with unique abilities for battle and life
Build your base – Craft, decorate, and create a home underground
Automate production – Unlock machines and logistics to accelerate progress
Fight powerful enemies – Explore dangerous ruins and forgotten technologies
After surface civilization's destruction, you're an underground survivor exploring a world of unknowns and dangers. Wield your pickaxe, explore ruins, befriend Monster Girls, build automated production lines, construct your base, and return to the surface!

Grip your pickaxe and extract abundant underground resources. Chip away at rock walls or use powerful explosives to blast entire mineral veins - enjoy the satisfying destruction. Collect ores and rare materials to fuel construction, production, and equipment upgrades.

Meet Monster Girls with unique abilities during your underground adventures. Each has distinct personalities, but earn their trust and they become powerful combat allies with special exploration skills. They also help at your base with farming, cooking, gathering, and production - boosting your survival efficiency.

The vast underground hides countless secrets and dangers. From deep caverns to forgotten human ruins, fight alongside Monster Girls against powerful creatures, discover scattered lost technologies, and uncover the truth behind humanity's downfall.

Start with just a pickaxe, but master lost technologies to create powerful machinery. Construct automated production and logistics systems to power the super drill and accelerate your surface return.

In this sunless world, a comfortable, functional base ensures survival. Build workbenches, craft furniture, plan production and living areas, defend against underground creatures, and transform a crude cave into a warm home with your Monster Girl companions.
Take up your pickaxe, join your Monster Girl companions, explore underground secrets, and become the first human to return to the surface!
Engagement
Reviews
Themes across 58 recent reviews and how positive each mention is. A keyword signal, not full sentiment analysis.
Reviews
神秘小游戏,其实我是不推荐的,但是买都买了就当支持国产了。
Игра на любителя, но мне зашла. - локализация - количество контента +- сюжет зашел в геймплей ближе к финалу + фактория на минималках (ждемс обещанного dls в этом году)
It's sort of like a core keeper lite; featuring monster girl companions, some lightweight automation, and a linear narrative driven story. Its relatively simple and straightforward by comparison, but it still scratches that same itch if you're looking for something different. It goes on sale frequently. I cant say it'll wow your socks off, but I certainly think it's worth trying out for the price.
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Price dynamics, follower growth, revenue and sales trajectories with interactive tooltips
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Genres
Stats
All-time low is the lowest price we've recorded for this game since we started tracking it.
Languages: Simplified Chinese*, English, Japanese, Traditional Chinese, French, German, Spanish - Spain, Russian, Portuguese - Portugal*languages with full audio support
Hours played at review time, across 58 reviews with recorded playtime.
positive critical· bar length = how often the theme comes up
[h1]Fun to play[/h1] ☕︎ ♪.ılılıll|̲̅̅●̲̅̅|̲̅̅=̲̅̅|̲̅̅●̲̅̅|llılılı.♫♪ ☕︎ With over 80 hours of gameplay, I can say this game will give you plenty of fun hours. It's worth giving this game a chance, especially if you buy it on sale. [h1]Story[/h1] The story was better than I expected, featuring two different endings. I went in expecting just a mining sandbox, but I was surprised by how the narrative about humanity's downfall is developed through ruins and dialogues. [h1]Relationships[/h1] You can peep on them while they're showering... In the game you can build affinity with six monster girls and a cat girl child. It's a pretty basic mechanic, but it's not like you can marry any of them. Each of them has her own item shop based on trust. These shops unlock new weapons and some unique items from them. I liked this mechanic, but it could have more unique items and fewer generic ones. [h1]Gameplay[/h1] The game combines elements of mining, base building, automation, RPG and relationship simulation, while you uncover the truth behind humanity's downfall. The gameplay is smooth and there's a huge variety of weapons and powers. It has simple weapon customization that makes the game more fun, but could be better. [h1]Difficulty[/h1] There are four difficulty levels in the game and you can also customize your game to be as hard or as easy as possible. However, even on easy you need to pay attention, certain monsters can give you trouble. Running out of potions can punish you at any level of the game. [h1]Building[/h1] The building aspect of the game is very well done because everything snaps automatically to square blocks, like a chessboard. This prevents the player from having to align things manually. At first you create your base following the tutorial, but you're not forced to build your house there, you can go out to the world floors and build outside. The map floors are limited, they're not infinite, but they're large enough for the player to explore and build something cool. The buildings help you progress in the game and are necessary to advance the story. [h1]Bugs and Issues[/h1] Some issues I encountered: Sometimes floor blocks would become inaccessible highlighted in red, I couldn't remove or place anything on top. I had to save and reload the save for it to return to normal. When I went to sleep sometimes the character wouldn't get up normally, he would stay in the sleeping position even after getting out of bed (funny), he would only return to normal after interacting with something. Depending on how much you build within the maps the game starts to lag a bit, could be a performance or optimization issue. Saving and returning to the game fixed this.
Yep its great, i would love it if the first boss didnt drop a broken pickaxe with 97% power though destroys the whole progression on layer 2-3-4-5-6 and so on. Why drop something that good that early? just remove it from the drop pool or nerf it to have the same power as layer 1-2 pickaxe MAX. It killed my dopamine i was having lots of fun untill then kinda forcing myself to play now to get to later stages where new upgrades matter again but it seems thats even higher then tier 5? idk. Steady increase in power is the way. Short but high dopamine rewards just ruin it. To developer: please add a quickstack items to nearby chests! like 10 block range or similiar having to sort items all the time is a pain, would be a huge quality of life update to the game. also the pickaxe thing. otherwise so far early game is 10/10
Its fun I like! little better than core keeper just a little bit in the art not the game play!
I find this game so much more fun than the core keeper that everyone is comparing it to. Where core keeper bored me in about 10 hours or so, this one has a purpose, and a sense of progression, with the new people you enlist and the getting closer to the surface. Plus a dedicated large space to make a nice base. And, i think better art, but that can be subjective.
Esta divertido el juego. Le falta algunas mejoras como por ejemplo en tu base poder cambiar la dirección de los muebles Horizontal o Vertical. También el charco que hay en una esquina de agua debería poderse moverse. Aumentaría la capacidad de las acompañantes y que cuando estas excavando te ayuden a excavar con el pico que les pones. Las antorchas deberían dar mas rango de iluminación parece que tengo el mapa lleno solo de antorchas xD. Meter subjefes y jefes en el mapas o que haya eventos raros aleatorios en el mapa abría sido genial.
Хм. Недофабрика с управлением мутировавшим женским коллективом, с неплохим эксплорингом и дестроингом всего подряд, даже есть сюжет - настолько хороший, что разработчик позволяет его отключить. Тут все недоделанное, и шаблонное - но удивительно гармоничное. Если надо глубоко расслабить мозг после тяжелого рабочего дня самое то.
好玩 , 大部分時間都花在自動化分配上 , 建議選難度高一點 , 要玩一般的冒險有點太容易了. 自動化的內容很容易懂 , 隨便玩一玩放一放就能知道怎麼安排了.
Active players
Estimated daily and monthly active players (DAU/MAU) modeled from peak concurrency.
Players by region
Where this game's players are, estimated from review languages.
Players also reviewed
The games this title's players most often review too — audience affinity.
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