Underground Security Inc Demo
Playing now
1Sampling since 17:57 UTC
100%of peak
All-time peak
111 Sep 2026
Playing now
1Sampling since 17:57 UTC
All-time peak
111 Sep 2026
| Published | Kind | Announcement | Build |
|---|---|---|---|
| Game update | Demo Patch v0.4.21 Updating the demo for several bug fixes: · Fixed the behaviour of Ancient Tomes: Hymn to Istar, Tomida Femina · Grand plan on the Mastermind now applies to a maximum of 5 buildings matching the ability description · All "Core" buildings apply 3 stacks of their respective buff matching the building description · Fixed a bug with displaying the priorities of Snake Nests when swapping buildings ·… | — | |
| Community | Dev log: Munchkin Hero Preview Here is sneak peak at one of the enemy hero types we are working on for the fulll release... Munchkins enters the dungeon as high-health slow moving units, but they pack some tiny surprises. On defeat, a Munchkin spawns a group of smaller, faster Munchkins which can quickly get overwhelming if not dealt with! Higher-level Munchkins spawn with the Hat of Mischief item. Be wary as when you defeat… | — | |
| Game update | Demo Update v0.4.20 An update to the demo addressing some bug fixes: · Fixed a bug with the "Underworld Gathering: Chorus" tome where battlechant was not added properly · FIxed the entrance generation code, where a new entrance with an unreachable path was possible · Fixed a bug where sometimes the cursor would become stuck on certain buttons · Fixed a bug where AWSD panning stopped working on rare instances · Gia… | — | |
| Game update | Demo Patch v0.4.19 Update to the demo with some bug fixes: · Fixed an interaction between moats and tomes that trigger when slow is applied to heroes · Fixed a pathing bug with False Chests where heroes will attempt to reach False Chests that are fully blocked off · Added additional UI feedback for when Exhume and Exhume+ triggers on the Ghoul / Undertaker · Added additional tips for first encountering heroes wit… | — | |
| Game update | Demo Patch v0.4.18 Additional bug fixes for the demo: · Added additional guidance for the tutorial mining task · abandoning runs in game triggers the end game and meta-progression screen · fixed bug where opening the settings while purchasing a tool leads to a soft-lock | — | |
| Game update | Demo Patch v0.4.17 Hotfix to the demo fixing some bugs: · Toggling the pause via space-bar was unreliable · Skipping narrative cut-scenes with space-bar triggered day start · Fixed an entrance generation bug which could result in placed blocking buildings blocking the path to the new entrance | — | |
| Game update | Demo Patch v.0.4.16 A minor patch to the demo to address a few QOL points · Boss and skull scenes can be skipped early with the space bar · Added a randomization option for selecting factions when starting a new game · Fixed some typos | — | |
| In-game event | Narrative Update + Hero Ability Rework for new Demo Patch Narrative and Player Tips The full-release is planned to include a meta-narrative that spans across runs and explores some of the relationships between the different bosses as well as the history of the Shareholders and its company. Much of this will be explored through short pre-combat dialog scenes that will progress the story as the player faces each boss over multiple runs. The demo now inc… | — | |
| Game update | Demo Bug fixes Some bug fixes have been applied to the demo: Bug fixes: · The "Apicius" tome now triggers properly on bosses · Fixed sometimes minions spawn near entrance pillars are not targeted by heroes · Fixed interaction between Overcharge Defenses spell and "Andromache" tome where some buildings are not properly targeted · "Beowulf" tome now provides 2 levels of armored as intended · Fixed bug where Tin… | — | |
| In-game event | Demo Patch - Tutorial + polishing + balancing update A new update to the demo, mostly aimed at polishing some ui-elements, as well as the tutorial / on-boarding for new players Gameplay Changes: · The sacrifice to draw a minion mechanic, holding minions from turn to turn and starting obelisk is committed from the tutorial and instead is unlocked as "mementos" after completing the tutorial run · All "core" buildings and Arcane Altar have been rewo… | — | |
| Game update | Demo Balance Update + Bug fixes An update to the rebalancing some of the gameplay elements as well as reworking some of the minion and tome abilities. Minion Ability Changes Some of the minion abilities have been reworked to reduce some of the complexity of the higher rarity minions. Now, on average uncommon minions have 1 - 2 abilities / starting perks, rare minions have 2 abilities / perks while legendary minions have 2 - 3… | — | |
| Game update | Demo Update - Tutorial changes + lighting mode + hero previews A quick update to the demo. Added: · hero party previews: hovering over the preview shows a tooltip for the heroes of the next party so players can better plan for the next wave ahead of time · New lighting modes: moonlight, daylight vs dungeon (classic). Let me know which one is your favorite Changes: · uncompleted task reset: at the start of the night phase, instead of losing all progress tow… | — | |
| Game update | Demo Balance Patch Small balance patch for the demo · Boss difficulty scaled down - we were finding new players were struggling with the difficulty spike a bit too much · Emerald ore cost: 3 -> 2 - unfortunately, this means if you update the client while having an active save, there may be a bit of weirdness where existing ores will have the old cost, while newly spawned ores will have the new cost · Rain of arro… | — | |
| Game update | Hotfixes for Demo Hotfix to bugs: · Black texture on walls · Shadow Mage + transformation ability leading to infinite minions · Outbreak plague effects affecting subsequent runs · Visual bug selecting the gate in combat · Minions not being alerted after taking damage from Summoned Drone Automaton Balance Changes: · Ice Crystal, Slime Crystal, Lightning Crystal, Flame Crystal base damage: 5 -> 10 · Increased diff… | — | |
| News | Demo Officially Released! We are excited to announce the demo release of Underground Security Inc! What's in the Demo? Players can play a full run of 3 infamy levels (acts) on one of 4 difficulty levels. The demo includes 50 minions, 75+ ancient tomes and 4 possible bosses to test your dungeon against! Players can earn souls by completing runs. Souls can be allocated for starting tomes in between runs to give the player… | — | |
| In-game event | Changes based on your feedback We received a lot of great feedback from our last round of playtesting. Thank you again to everyone that participated. Here are some of the gameplay changes we have in response to the new insights. New rock shapes One thing we consistently heard is mining often feels underpowered and players want to engage with the mining mechanic more. However often it was expensive in terms of the number of m… | — | |
| Community | Run Synergies and New Buildings Happy holidays! First of all, a huge thanks to everyone who has participated in our public playtest so far. We have gotten a lot of great feedback and will be working to include many gameplay adjustments as well as some new content in the next playtest build. If you haven't had a chance to participate in the playtest, there is still time to join! Run Synergies In this post, we wanted to highlig… | — | |
| Community | Open for Playtesting! We have opened up the game for a round of public playtesting! This is your chance to check out the state of development so far and help shape the future of the game! You can request access to the playtest directly from the steam landing page. Looking forward to hearing your feedback. Happy dungeoning! | — | |
| Community | Dev Log: Mining Mechanics Here's a little development log about the mining mechanic in Underground Security Inc! One of the tower-defense elements we wanted to include is the ability for players to affect enemy pathing. Players can do this by assigning minions with the mining skill to the rocks around the dungeon in order to clear those rocks. This allows players to expand the dungeon unlocking new spaces to place build… | — | |
| Community | Dev Log: Buildings Mechanics + Upcoming Playtest We are still hard at work at building a demo. In the meanwhile here is a preview of the building system we have been working on. You dungeon will require buildings to help in its defense. Depending on its type each building will have an associated build cost (blue) or channel cost (purple) required for construction. In order to fulfil the construction cost of a building, minions must be assigne… | — | |
| Community | Underground Security Inc | Announcement Trailer Happy holidays everyone! Checkout out our new trailer! We have just released the announcement trailer for Underground Security Inc ! Checkout some early footage of the gameplay and let us know what you think! Upcoming Updates We are planning a series of updates to highlight the gameplay systems in the upcoming months. Follow us to stay up to date! | — |
Announcements are the developer’s own posts to the game’s Steam news feed: updates and their patch notes, in-game events, releases and sales. The important ones are marked on the players chart.