Steam app 2171630 · updated 12 Sep 2026, 21:02 UTC
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.
438 hourly samples, with the daily peak drawn over them. Weekends are shaded.
34 months, December 2023 to September 2026. The highest number of people in the game at once, each month, on a time axis -- a gap in the record stays a gap.
The highest number of people in the game at once, each month. Four, because four is as far back as the source keeps anything finer than one figure a month.
31 days, each one the highest figure that day. The source keeps no hourly detail this far back. Weekends are shaded.
31 days as the curve, each the highest figure that day. Behind it, 169 hourly samples from 13 Aug, which is as far back as the source keeps every hour. Weekends are shaded.
12 days as the curve, each the highest figure that day. Behind it, 269 hourly samples. Each dip is a night. Weekends are shaded.
Return from Core was released on 17 Jul, 2025.
| Language | Full audio |
|---|---|
| Simplified Chinese | ● |
| English | |
| Japanese | |
| Traditional Chinese | |
| French | |
| German | |
| Spanish - Spain | |
| Russian | |
| Portuguese - Portugal |
A blank audio cell means full audio was not marked in the returned language list.
35 achievements in total.
50 developer announcements, Nov 2024 to Jun 2026 · times in UTC
Dear Explorers,We have deployed a hotfix to address the following issues:Fixed an issue where the third slot of the "Cooking Table" in Sandbox Mode had a chance of failing to unlock.Fixed an issue where certain keybinding settings could…
Patch notesHey fellow adventurers!We've released a minor update addressing the following issues: Fixed an issue where the Item Selection and Field Guide screens would not unlock item slots properly in Sandbox Mode.
Patch notesHey fellow adventurers! Greetings! We're excited to announce that version 1.0.8 is launching soon. This update brings several major optimizations and new features designed to make your underground adventures more flexible and enjoyable.…
MISCHIEFHey fellow adventurers!We've released a minor update that improves and fixes the following issues: System Improvements:· Added custom keybinding options for "Interact 2 (C)" and "Interact 3 (V)" Bug Fixes:· Fixed an issue where Absorption…
Patch notesHey fellow adventurers!We've released a minor update that improves and fixes the following issues: System Improvements:Ÿ Improved drone performance and efficiencyŸ Enhanced radial menu positioning accuracy when view distance is reducedŸ…
Patch notesDear adventurers, Each level of the "Return from Core" boasts its own unique ecosystem. This time, we’ll take you on a journey through this subterranean odyssey. From the Dark Forest to the Swamp Depths, from shadowy caves to the wondrous…
MISCHIEFHey fellow adventurers!We've released a minor update that improves and fixes the following issues: \· Added view distance adjustment feature: Hold Ctrl + mouse wheel in-game, or fine-tune in the settings menu· Added new audio settings…
Patch notesHey fellow adventurers!We've released a minor update addressing the following issues:· Fixed a rare issue where Backpack and Warehouse items could disappear unexpectedly· Fixed an issue where "Speaker" music would occasionally overlap with…
Patch notesHello there, fellow adventurers!This is a straightforward guide to help you create game mods, covering - Essential tool acquisition for Mod development, modifying monster girl art assets, replacing in-game appearances, adding or editing…
MISCHIEFHey fellow adventurers,We've released a minor update addressing the following issues: · Fixed an issue where "Underground Vines" had a chance to grow abnormally.· Fixed an issue where the "Speed Up" talent had a chance to fail reaching…
Patch notesDear Explorers,"Return From Core" Version 1.0 is now officially released! In the coming weeks, we will continue gathering player feedback and optimizing the game to deliver an even better experience.Below is our planned update roadmap: We…
MISCHIEFHey fellow adventurers!We've released a minor update addressing the following issues: · Fixed an issue where outline materials were missing for some mods.· Fixed an issue where crafting Charcoal could sometimes fail.· Fixed an issue where…
Patch notesDear Explorers, The 1.0 full release has been released today, and it’s now available at a 30% discount for a limited time! The Steam Workshop for the game will go live alongside the official release, allowing players to customize character…
MISCHIEFDear Explorers: We pushed a small update that optimized and fixed the following issues: \ Significantly optimized code performance; Fixed the issue of misaligned dialogue in certain cutscenes. Discord
Patch notesFellow explorers,We're excited to reveal that Return from Core full release launches July 18th, 2025 on Steam! Join us for the ultimate underground odyssey! Core Level 8 takes you deep into fallen megacities from the Great Disaster. Beyond…
MISCHIEFDear Explorers: We pushed a small update that optimized and fixed the following issues: -Fixed the issue where the bubble skill of had a probability of causing the character to get stuck; -Fixed the issue where some machines had a…
Patch notesDear Explorers: We pushed a small update that optimized and fixed the following issues: -Fixed an issue where monster girl would occasionally lose items when carrying -Fixed an issue where the “Don't drop items when you die” talent did not…
Patch notesDear Explorers: We pushed a small update that optimized and fixed the following issues: -Fixed an issue where monster girl would occasionally lose items when carrying -Fixed an issue where the “Don't drop items when you die” talent did not…
Patch notesDear Explorers: We pushed a small update that optimized and fixed the following issues: -Items such as its exclusive Pick recipes, Rings and Bracelets can be purchased in the Monster Girl's Store; -Fixed the issue where equipment had a…
Patch notesDear Explorers: We pushed a small update that optimized and fixed the following issues: -Fixed the issue that the main quest had a probability of not being completed; -Fixed the issue that the Conveyor Belt had a probability of stopping…
Patch notesDear Explorers: We pushed a small update that optimized and fixed the following issues: -Fixed the issue that Lilith's avatar was incorrectly displayed in the favorability upgrade interface of ; -Fixed the issue that the fishing animation…
Patch notesDear Explorers: We pushed a minor update that optimized and fixed the following issues: · Expanded usage scenarios for "Water Pump", now supporting direct placement on the ground in the Core Level 7 · Improved transport AI for Monster Girls…
落花离人泪Dear Explorers: We pushed a minor update that optimized and fixed the following issues: -Fixed a bug where monsters' damage buff values were abnormal. -Fixed the issue where the detector could not detect the boss of 7th floor. -Fixed an…
MISCHIEFIn the vast undersea world, countless unknowns and mysteries waving an uncharted area. Ancient life and modern creatures coexist, what’s the story of monster girls from this level? Dear inner-earth explorers, we are excited to announce that…
MISCHIEFDear Explorers: We pushed a small update package that optimized and fixed the following issues: 【System Optimization】 Optimized the monster generation rules in the lair; Optimized the performance of the animation and lighting modules; 【BUG…
落花离人泪Dear Explorers: We pushed a small update package that optimized and fixed the following issues: 【System Optimization】 ·The pickup adds the maximum number of grabs, and can freely adjust the number of items to be grabbed each time ·Optimized…
MISCHIEFHello Explorers! We've released a small update package that optimizes and fixes the following issues: · Fixed an issue where some generators would occasionally fail to function after placement · Fixed an issue where the main quest "The…
MISCHIEFDear explorer, We have pushed a small update package to optimize and fix the following issues: · Optimized the AI logic of monster girl's enemy search, and now it will give priority to attacking the target that is attacking the player ·…
MISCHIEFDear explorer, Hello, explorers, we have pushed a small update package to optimize and fix the following issues: ·Optimized the performance of the conveyor belt; ·Optimized the collision box size of crops to avoid hindering players'…
MISCHIEFDear explorer, Hello, explorers, we have pushed a small update package to optimize and fix the following issues: ·Added Beehive and Moth Swarm to the nest outside the Sticky Village on the sixth floor; ·Fixed the problem that the boss nest…
MISCHIEFDear explorer, Hello, explorers, we have pushed a small update package to optimize and fix the following issues: Increased the damage coefficient of the hot floor; Reduced the number of materials required for the early upgrade of monster…
落花离人泪Dear explorer, Hello, explorers, we have pushed a small update package to optimize and fix the following issues: 1. Optimized the logic of selecting seeds when Monster Girls are farming; 2. Optimized the logic of entering and exiting…
MISCHIEFDear explorer, Here is the list of changing in latest update: 1. Fixed the problem that the main task of the third layer of the earth's core may not be triggered; 2. Fixed the problem that the main task will create repeated ground marks; 3.…
MISCHIEFDear explorer, Here is the list of changing in latest update: Optimized Cabin experience for existing game save by new Camp Warehouse. Fixed a bug where Ores won't be consumed by Furnace when playing as Engineer. Fixed a bug where monster…
MISCHIEFDear explorer, Development for Level 7 is mostly finished, and we're currently in the final stages of testing and optimization, striving to deliver the best possible exploration experience for you all! We're planning to release the major…
MISCHIEFDear explorers: After months of development, the seventh level for “Return from Core" is now basically complete. We are already conducting final testing and tuning work, and we believe that it will officially release soon. Since the…
Patch notesHello, inner-earth explorers! Here is the list of changing in latest update: ·Optimized the design for getting out of bed; ·Optimized the crafting materials for the to reduce the crafting difficulty; ·Optimized the layer display order of…
Patch notesHello adventures, we have pushed a minor update package to fix the following bugs: ·Fixed the bug where some quest items couldn't be submitted; ·Fixed the bug with abnormal material counts displayed when using items from nearby storage at…
Patch notesHappy Chinese New Year, inner earth adventurers! As firecrackers bid farewell to the old year and snow foretells a bountiful harvest, we extend our heartfelt gratitude and warmest wishes to all the explorers who have accompanied Journey…
MISCHIEFHello, inner earth adventurers! We have released a small update that brings you following improvements: Fixed a bug that may prevent entering the game caused by incorrect data of items.
MISCHIEFHello, inner earth adventurers! We have released a small update that brings you new year limited items! Fireworks: Welcome the arrival of the new year amidst the dazzling fireworks! New Year limited items added: 3 Fireworks in Happy New…
MISCHIEFHello Inner Earth’s Creatures! Merry Christmas! TanXun Studio and 2P Games extends our sincerest thanks and best wishes to every adventurer who has accompanied us on this journey. Your enthusiasm and support have ignited our creative flame…
飞鸟喵Hello, inner earth adventurers! We have released a minor update that brings you following improvements: 1. Fixed the bug where the Delivery Station could occasionally cause the game progress to freeze; 2. Fixed the bug where the Delivery…
MISCHIEFHello Inner Earth’s Creatures！Here is the list of changing in latest update: Fixed a bug where Ganerator can not be removed after placing on Level 2 Fixed a bug where items will dissapear when transport between levels Fixed a bug where game…
MISCHIEFHello Inner Earth’s Creatures！Here is the list of changing in latest update: Fixed a bug where Lilith will disappear. Fixed a bug where numbers of damage will be displayed wrongly. Increase the numbers of Gear for Fixing in sale.
MISCHIEFHello Inner Earth’s Creatures！Here is the list of changing in latest update: 1. Fixed a bug where productions from Hive and Silkworm Box could not be taken away 2. Fixed a bug where Expanded Backpack can not hold dropped items
MISCHIEFHello, adventurers! We have pushed a small update package that fixes the following bugs: 1. Fixed a bug where some players would get stuck on the loading screen after entering the game; 2. Fixed a bug where machines like Delivery Terminal…
MISCHIEFHello, adventurers! We have pushed a small update package that fixes the following issues: 1. Fixed the bug where the bomb talent tree could occasionally produce errors; 2. Fixed the bug where using tools like the Surveyor would cause…
MISCHIEFHello Inner Earth’s Creatures! Here is the list of changing in latest update: It is important to note that in this update, we have added a world save feature. Character data will be separated from world data, allowing characters to enter…
MISCHIEFHello Inner Earth’s Creatures! In the past two months, thanks to the assistance of all players, we have fixed many issues in the game and updated some content to optimize the gaming experience. Subsequently, we have devoted more energy to…
MISCHIEFIt runs on public data and somebody's spare time.
https://paypal.me/KintaroPalPay[email protected]0x4d559C765AA8BFe336E36d5b76024926767eD38dTJtctWU9uetJaTBoSybd1RErW7n9duTKVG