Status
SteamPeaks
ChartsSalesUpcomingPatchesNewsCalculator
New on SteamEvery app, DLC and depot the minute Steam creates itAppsEvery app on Steam, newest change firstPackagesSubs and bundles, and what each containsDepotsDepots, manifests and install sizesTagsSteam's user tags and the games under themDevelopers & publishersCompanies and their cataloguesTechnologiesEngines, SDKs and anti-cheat found in the filesChange historyEvery PICS changelist as it lands
SignalsNineteen readings of the whole catalogueCompareAny games side by sideRecordsAll-time peaks and the days they were setReportsWeekly and monthly write-upsAlerts & newsroomWatch a game, get told when it movesSteam statusIs Steam up, right nowWeb API explorerTry the endpoints in the browser
NewsSteam's own announcements and the sales calendarCalculatorWhat a Steam account is worth, and its pile of shame
/
Sign in
/
SteamPeaks
The ultimate resource for Steam data.
ExploreChartsSalesSales and festsUpcomingPatchesNewsRecordsTrendingSignals
DatabaseAppsPackagesDepotsTagsDevelopersTechnologiesChange history
ToolsCalculatorCompareSearchAlertsSteam statusAPI
SiteMethodologyFAQDiscordSupportSign in via Steam
Not affiliated with Valve or Steam. Game names and artwork belong to their owners. All times UTC.
PrivacyCookiesFair useStatus
Underground Security Inc DemoNewsRun Synergies and New Buildings
Community

Run Synergies and New Buildings

Underground Security Inc Demo · published 19 Dec 2025, 22:29 UTC

All newsPlayers around this dateRead on Steam

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 highlight some of the types of gameplay interactions that allow for varying build strategies.


For example, some minions begin the game with the thorn combat perk, which deals reciprocal damage when the minion is attacked from within melee range. Similar effects are pretty standard and often appear in turn-based games.

A player may be able to build a strategy around this perk by collecting tomes such as Thebaid and Great Expectations which augment the way that a minion with thorn is triggered.

Now, the ability tooltip for thorn highlights the bonus effects received from these tomes and make such minions much more effective against ranged heroes!

New Buildings

We wanted to push the design space of the defensive buildings in our tower defense game, within the constraint that it must fit well within our theme of dungeon defense. The Laser Prism is a new building which generates a laser connecting to each other Laser Prism in the same row or column. Upgrading the Laser Prism increases the damage of each laser connected to it:

The Snake Nest is a new building that summons an undead serpent that prowls the floors of the dungeon during the day phase. The serpent burrows in and out from one Snake Nest to another dealing damage to any heroes it comes across:


That's it for now. Look forward to seeing some of these new features in the next playtest build!Happy holidays and new years!

More from Underground Security Inc Demo

Other announcements

All news
Game update11 Sep 2026Demo Patch v0.4.25Quick 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.Game update22 Aug 2026Demo Patch v0.4.24A quick update to the demo to fix a few bugs · Modified 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 trigger · Fixed an issue where restarting the day while in a tutorial screen disables tooltips temporarilyGame update10 Aug 2026Demo Patch v0.4.23Demo 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