- Dev Log Preview: March of the Druids - 11 September 2026
Druids are an enemy that become more of a nuisance the longer they survive. Starting from level 1, they are able to periodically transform into their bear form making them much more deadlier. While in bear-form, druids have additional temporary health, increased movement speed and increased attack damage! The more transformations a druid is able to perform, the most damage he is able to soak from the dungeon's defenses...Brambehorns is ultimate druid, come to pacify your dungeon. In the final nights leading up to his arrival, he applies the roots of Bramble's Curse to buildings in the dungeon.The roots prevent the affected buildings from activating and require assigning minions with the mining skill to clear them. If not cleared in time, you might find yourself defending without your most powerful traps in the final encounter! Like his druid brethren, Bramblehorns can also transform int…
- Demo Patch v0.4.25 - 11 September 2026
Quick hotfix to the demo fixing a bug with the Shadow Mage where the dark synergy was trigger on assign and past the normal 3 ability cap.
- Demo Patch v0.4.24 - 22 August 2026
A quick update to the demo to fix a few bugsModified the logic for Tomida Femina so that it no longer tries to draw past your hand size Fixed a bug where Book of Riches Volume 3 does not triggerFixed an issue where restarting the day while in a tutorial screen disables tooltips temporarily
- Demo Patch v0.4.23 - 10 August 2026
Demo patch fixing some bug fixes:Fixed a bug where minions could be dragged from the crypt and deck could allow the minion to be deployed or assigned into the dungeon Fixed an issue, where opening the settings menu on controller can lead to a soft-lock while in the tutorial
- Demo Patch v0.4.21 - 8 August 2026
Updating the demo for several bug fixes:Fixed the behaviour of Ancient Tomes: Hymn to Istar, Tomida FeminaGrand 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 descriptionFixed a bug with displaying the priorities of Snake Nests when swapping buildings Fixed a graphical bug with units when they receive multiple hits within a short intervalFixed a graphical bug where finding new buildings modified the tag of existing buildings to add "unmovable"Fixed a controller bug where the controller can get stuck on a single button
- Dev log: Munchkin Hero Preview - 7 August 2026
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 these guys they will permanently reduce the damage of nearby buildings!Bringing up the vanguard for the Munchkins are the Bosses Hansel and Gretel. One is used to fighting in close-quarters while the other excels at attacking from range! These twins bring an extra level of trickery! On the night before their arrival, they love to "gift" Gingerbread Boy minions to your hand.What may first look like a blessing is actually a curse in disguise. These minions prevent you from advancing to the combat pha…
- Demo Update v0.4.20 - 4 August 2026
An update to the demo addressing some bug fixes:Fixed a bug with the "Underworld Gathering: Chorus" tome where battlechant was not added properlyFIxed the entrance generation code, where a new entrance with an unreachable path was possibleFixed a bug where sometimes the cursor would become stuck on certain buttonsFixed a bug where AWSD panning stopped working on rare instancesGiant Slayer perk modified to scale with its level Dialogs can be skipped to the end of the text by left-clicking
- Demo Patch v0.4.19 - 29 June 2026
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 with the hidden condition Slightly increased minion alert rangesFixed various typos
- Demo Patch v0.4.18 - 24 June 2026
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
- Demo Patch v0.4.17 - 24 June 2026
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
- Demo Patch v.0.4.16 - 15 June 2026
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 gameFixed some typos
- Narrative Update + Hero Ability Rework for new Demo Patch - 10 June 2026
Narrative and Player TipsThe 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 includes some narrative events for the demo bosses.This system is also utilized to help provide useful tips to players during their first few runs, explaining concepts not covered by the tutorial like hero pathing and building movement. Gameplay Changes:New Minion Headquarters Building. This is a special building which starts in the dungeon after the player has unlocked the Yorick's Skull Memento. The Minion Headquarters can be upgraded to increase the draw size of the player as well as how many minio…
- Demo Bug fixes - 15 May 2026
Some bug fixes have been applied to the demo: Bug fixes: The "Apicius" tome now triggers properly on bossesFixed sometimes minions spawn near entrance pillars are not targeted by heroesFixed interaction between Overcharge Defenses spell and "Andromache" tome where some buildings are not properly targeted "Beowulf" tome now provides 2 levels of armored as intendedFixed bug where Tinker minion's attacks did not trigger perks properly Fixed instructions not displaying when choosing a boss tome Fixed push trap interaction where damage was not applied properlyUI changes:The tooltip for placed objects in the dungeon (buildings, rocks, deployed minions) is now always displayed at the lower right corner, so that players can pan the camera to see the building's range
- Demo Patch - Tutorial + polishing + balancing update - 22 April 2026
A new update to the demo, mostly aimed at polishing some ui-elements, as well as the tutorial / on-boarding for new playersGameplay 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 reworked and only apply their buffs to mechanical and magical buildingsNew Forge (Forge of Slime, Flame, Arcana and Blood) buildings apply buffs to deployed (and sometimes summoned minions)Minor rebalancing for some tomes and events Reworked tutorial cardsUI changes:New game models for some heroes + minionsUpdated building descriptions + tooltips to be more concise Selecting night bonus options does not require players returning to the map (less waiting for animation)Added transition animations Bug Fixes:U…
- Demo Balance Update + Bug fixes - 21 March 2026
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 abilities / perks. Some abilities such as the Cult Leader requirement for the Enchanter and Necromancer have been reworked to be simpler. In general, card draw abilities have been reduced and more minion abilities favor "when deployed" while legendary minions are a little weaker in general. Reworked minions: undertaker, lich, enchanter, necromancer, gorgon, vampire. greenling, troll, mastermind Economy Modifications The coin economy has been slightly altered. Now players gain 2 coins for successf…
- Demo Update - Tutorial changes + lighting mode + hero previews - 12 March 2026
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 favoriteChanges: uncompleted task reset: at the start of the night phase, instead of losing all progress towards an uncompleted task (this felt a bit too punishing), instead only a single icon's worth of progress is lost tutorial change -> the secondary faction has been changed to undead, and the tutorial steps have (hopefully) been streamlined a little bit
- Demo Balance Patch - 10 March 2026
Small balance patch for the demoBoss 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 costRain of arrows: base damage decreased 60 -> 45 Summon Demon Prince: base health / damage increased from 125% -> 150% Dungeon Walls no longer have a construction cost and can be placed for freeAdded a more robust save system to prevent corrupted saves
- Hotfixes for Demo - 9 March 2026
Hotfix to bugs: Black texture on wallsShadow 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 AutomatonBalance Changes:Ice Crystal, Slime Crystal, Lightning Crystal, Flame Crystal base damage: 5 -> 10 Increased difficulty option on events increase the level of heroes by: 2 -> 1
- Demo Officially Released! - 6 March 2026
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 an advantage for their next attempt!What's next?We are still actively working on the demo! We will shift away from adding new content and focusing on adding QOL improvements, balance updates and controller / steam-deck support. What's not in the Demo?The full game will feature a narrative element that will stretch 5 different regions, each with their own unique heroes and bosses. The game will of course contain more content in general: more minions, buildings, events and ancient tomes! We hope yo…
- Changes based on your feedback - 30 January 2026
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 shapesOne 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 minions required to mine out a large section of dungeon. In the latest build, rocks can spawn in a variety of tetris-like shapes include 1x2, 1x3, and L-shaped blocks. This randomization allows for the creation of larger spaces to build traps or death corridors requiring fewer mining minions, as well as provide interesting geometric decisions about how to carve out the shape of the dungeon. Meta-ProgressionA feature that was heavily requested was some form of meta-progression. While we were initially…
