Steam app 1540960 · updated 12 Sep 2026, 18:59 UTC
An idle dungeon management game, where high tier units can create low tier units.
718 hourly samples, with the daily peak drawn over them. Weekends are shaded.
65 months, May 2021 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, 437 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, 281 hourly samples. Each dip is a night. Weekends are shaded.
Underworld Idle was released on 2 Feb, 2023.
| Language | Full audio |
|---|---|
| English | |
| Russian |
A blank audio cell means full audio was not marked in the returned language list.
8 achievements in total.
38 developer announcements, May 2021 to Feb 2024 · times in UTC
Added a small cross-promo reward related to my new game participating in Stem Next Fest.
Patch notesSteam Next Fest brings hundreds of demos for games that have not been released yet. My new game, Epic Auto Towers, demo is also a part of this festival. Install the demo and add the game to your Wishlist!…
e^chaVersion 1.02 Pearls and pearl power are now not reset on restarts. Contract of the Drowners now increases the power of sea pearls (previously, this contract allowed you to not reset pearls). Added another special one-time reward when…
e^chaVersion 1.01 Fixed some rounding errors during the output. Fixed bugs with portraits in the doppelganger list. Perhaps the bug with the max button for secondary contracts has been fixed (I have not been able to reproduce the bug myself).…
e^chaHey everyone! I'm excited to announce that I'm making a new game, "Epic Auto Towers"! Epic Auto Towers is a turn-based strategy game combining elements of autobattler, deckbuilder and roguelike. Purchase uncommon and rare Towers and build…
e^chaThe game has been released! Release! In general, the core of the game was ready quite a long time ago, but the planned faction of robots, as well as 'hanging' bugs prevented the release from early access. But now the game is finally out :)…
e^chaVersion 0.71 I'm preparing the game to go from early access to full launch! Full release does not mean that the game will no longer be updated, rather it is a sign that the basic structure of the game is ready. A special bonus has been…
e^chaVersion 0.70 Fixed a rune prism bug that caused the prism to have no effect on crystal #2. Fixed a bug that caused the warlock contract to not always give 1500 dark mana after restart. Fixed '0' in pearl names. Reset gears now remove gears…
Patch notesVersion 0.68 - Bugfixes Fixed a bug that sometimes caused the game save to be written to the clipboard by itself. Fixed a bug causing energy not being restored offline if the first crystal is not activated. The robot faction book is placed…
Patch notesA new special offer has been added. It's made as a DLC, so it will have a regional price and will be associated with a Steam account (instead of being associated with a save).
Patch notesGame updated! Added robot faction In order to open the robot faction, you need to visit the rusty world. Robots create a resource "Power boost", which, in turn, increases the efficiency of crystals. Robots are not reset on normal restarts…
e^chaGame updated! Version 0.63 A dark world has been added. The dark world provides a special bonus: activation of each crystal reduces the difficulty of the world. After completing the dark world, this bonus will apply to all worlds (including…
e^chaGame updated! Version 0.62 Five new challenges have been added to the Hall of Fame. 4 of 5 added challenges will be hidden at first, you will have to complete 'Challenge #4' to unlock them.
Patch notesThe game has been updated! Version 0.61 Changelist: Added new contract that increases the maximum level of the base contracts (A, B, C, D, E, F). Added new contract that allows you to get the essense. New world added: Undead world New…
e^chaVersion 0.60b It's not a huge update, but I hope it allows me to slowly get back to work. List of changes Added secondary contracts and the regular contract that opens them. Added a dead man's piggy bank, a analogue of the infernal piggy…
Patch notesThe game has been updated! Version 0.59 Added new mechanics: Deep Oyster and Power of Pearls. Now you can buy deep oysters for raw mana (like buying fire spheres for gems). It took a long time to develop this mechanic, because raw mana…
e^chaVersion 0.58 Changelist Golden Gates: The difficulty of the world now has no effect on souls from the Break The Bond spell. Added remaining description texts for units. Fixed a bug when buying a contract after revisiting the world. The…
Patch notesThe game has been updated! Version 0.57 Added tab: Golden Gates. You need 1000 gold or more to open this tab. Through the golden gate you can enter other worlds. Entering a new world gives certain bonuses, which are kept between worlds. The…
e^chaVersion 0.56 Bugfixes Arena Mode. Added a new hero: the Warlock. When reborn, this hero boosts money received from monsters (this is a permanent bonus for all heroes). The option to increase gold will be needed for the new Golden Gate…
Patch notesVersion 0.54 Base effect of fire spheres, fire skulls, bottles of tears and dark amulets increased: +50% -> +100% to productivity. Units no longer need to have an upgrade to get spheres, skulls, bottles and amulets. Contracts related to…
Patch notesThe game has been updated! Version 0.53 Added additional settings for Buy Max button. (Max, 10%, Next) 'Next' duplicates the behavior of the control button. These settings will be available from the beginning of the game. A new sub-tab…
e^chaVersion 0.52 Added a warning about resetting the game to the challenges description. Hell ashes is no longer required for starting the challenge. The 'max' option has been added to the resource exchange menu buttons. Added a contract that…
Patch notesThe game has been updated! Version 0.50 Added a minigame: Arena. The arena is still in development, as it turned out to be larger than I expected. Currently there will be one hero and 23 items available, later new items and a new hero will…
e^chaVersion 0.49 Added a new spell: Break the bond. With this spell, you no longer need raw mana to create blackseekers, but souls are required instead. Added a new spell: Ouroboros. With this spell the number of units is not reset on restart…
Patch notesVersion 0.48c. Small udpate. Added settings that allow you to use the right mouse button as shift+left mouse, and the middle button as control+click. Auto-recycle settings are now kept on restart. Also, a setting has been added that allows…
Patch notesThe game has been updated! Version 0.48 Added infernal piggy bank, which allows you to automatically get hell ashes. In addition, the piggy bank works offline. Added secondary demon contracts. Secondary contracts have no maximum level limit…
e^chaVersion 0.47g. Small udpate. Gears reset has been reworked. A separate window now opens where you can choose to reset both unit gears and boiler/obelisk/chest gears. Periodically, you will be able to get free charges for resetting. The…
Patch notesThe game has been updated! Version 0.47 Undead Added lich hall, allowing you to automate the creation of rotten dolls and soul altars. In addition, the lich collects essence, which is needed for some mushrooms. Added two new contracts.…
e^chaThe game has been updated! Version 0.46 Warlocks Added RESTART for warlocks. Six basic contracts have been added. Drowners Added a gift from the chest. Gift can be received after restart of drowners, if you have a certain contract. Then you…
e^chaGame updated! Changelog Added contract to increase dark mana from mushrooms and from the contract J. Added a contract that enhances getting waste from mushrooms and gives a way to get additional waste when using the obelisk. New portraits…
Patch notesGame updated! Changelog Added a contract that opens the CEO Cabinet. There you can set up auto-buy and auto-distribute for fire spheres and skulls. Added a contract that allows you to expand the list of demons. (Relevant if you reach the…
Patch notesGame updated! Changelog Warlocks can now create bottles of mermaid tears and dark amulets. Added bottle of mermaid's tears: +50% to drowner productivity. Added dark amulet: +50% to warlock productivity. Added a setting that allows you to…
Patch notesVersion 0.42c - small update It is now possible to limit the number of units you buy by holding Control. However, in order to do this you will need to take a special demon contract (50 prestige). Advanced options for navigation arrows have…
Patch notesVersion 0.42 Changelist Contract C has been changed. Now it gives +60 energy, but only for the first 10 recyclings of gems (20, 30... depends on the level of the contract). Contract K: Added the third level of the contract (auto upgrades 25…
Patch notesVersion 0.41 Changelist Grimoire: added transition to the second page. Grimoire: added 4 new spells. Added special options when restarting. Settings: you can set the unit's cost in souls to be shown in the selected notation.
Patch notesVersion 0.40d Added restart for drowners. At the moment, the drowners only have 3 basic contracts, but I decided that it would be better to publish the update with these three contracts right now.
Patch notesGame updated! (version 0.40) Changelog: Added mushroom farm (undead faction). Overall, the farm is still in development, and only one mushroom works. Mushroom Farm: added dark mushroom (+150 dark mana or +1500 waste). Added names to…
Patch notesGame updated! (version 0.39) Changelog: Added a notice with information about game updates. Added a "Log" button to the settings menu for viewing the history of changes. Fixed a few typos. Two special packs were added to the token store.…
Patch notesEverything Steam lists as add-on content for this game, newest first. Prices are left out on purpose: the store answers this page in one currency and it is not the reader's.
| Name | Platforms | Released |
|---|---|---|
| Underworld Idle - Extra Tokens | Windows | 06 Jan 2023 |
What Steam runs, and with what. Straight from the app configuration.
| Description | Executable | Arguments | Platform | |
|---|---|---|---|---|
| Launch | imp_inf.exe | windows |
It runs on public data and somebody's spare time.
https://paypal.me/KintaroPalPay[email protected]0x4d559C765AA8BFe336E36d5b76024926767eD38dTJtctWU9uetJaTBoSybd1RErW7n9duTKVG