Unity Underground by KweepaView all by KweepaKweepa<br>Follow KweepaFollowFollowing KweepaFollowing<br>Add To CollectionCollection<br>Comments<br>Devlog<br>Related gamesRelated<br>Unity Underground

A downloadable engine port for Windows<br>Download

Unity Underground is an engine recreation of the 1992 immersive sim RPG classic. It includes the Unity-based engine and new 3d models and sounds, but requires original game data to work . When you run the game, you can point it to the installation folder for the original GoG files, or have it search for them.

all enemies fully modelled and animated<br>all inventory and environment objects fully modelled<br>unique audio and particle effects<br>requires xbox controller or equivalent<br>complete

I've been working on this since 2015, and wouldn't have been possible without previous hackers' generosity in sharing their results.

Changelist:

27 March 2026: fixed the data location persisting between runs.

28 March 2026: fixed european locale. fixed projectiles stacking.

28 March 2026 (b): fixed conversation at 800 pixels height for steam deck. added autorepeat to inventory movement.

14 April 2026: fixed goblin detecting player opening treasury; fixed bullfrog puzzle controls; fixed light source duration; fixed reveal spell potential crash; fixed night vision, drunk, and trip effects around save game; fixed barter items not having names; halve Tyball health when orb destroyed.

17 April 2026: fix rune bag Y icon to show Dr Owl; added Y to plant silver seed; increased weapon hit pause and added rumble; gave victory music priority over map music; centered conversation on the screen; added blood stains when critters die; fixed missing voice line in intro; hid weapon when it is supposed to be out of view; removed bullfrog "Reset Activated" voice over; fixed A button icon remaining after looking at grave; fixed silver/gold switch puzzle.

18 April 2026: fixed invisible enemy spawning; fixed bloodstains being spawned in the air or on water or lava.

19 April 2026: summoned monsters wander until they have a target; fixed wand of Acid and wand of Electrical Bolt; reduced volume of lava and water walk footsteps; fixed map color for puddles in Dorna's room; clamped throw speed and added a charge ring on the icon; fixed position of trade items after centering conversation.

25 April 2026: fixed damage traps (eg path to Ironwit's key, Tyball's maze); fixed equipped weapon being deleted when thrown; fixed quote marks in dream subtitles; fixed graves sometimes being rotated; fixed loose tile for wine (and some other scripting); fixed duplicate silver seed; allow repairs to serviceable items; silver sapling revive removes spells; no rock fall when rescuing princess; fixed particles on Tyball's orb; fixed Tyball and gazer floating when running and dying; fixed critter respawn if dying when changing level; shrine reports bad mantra before saying you can't advance; fixed duplicate key of truth.

27 April 2026: fixed edge of lava pit not destroying talismans; cast tremor when a talisman is burned; reduced volume of the cup dream sting; prevent magic, inventory, save, sapling rebirth on level 9; made moongates a little taller; increased duration of daylight to 5 minutes; added Basara Dragon to credits; fixes for some achievements progress not saving.

2 May 2026: player projectiles can damage doors; fountain restores some mana and cures poison; player projectiles' damage is skill-based; fixed sling swoosh sound timing; fixed shak loot not having names; prevent bloodstains corrupting scripting; fix camera height when flying from swimming; fixed some writing snap to wall; fixed random goblins having cloaks; freeze time removes critter defence; curse Tyball when orb destroyed; multiskill mantras choose more intelligently when skills maxed out; allow rock hammer to break small boulders; save castSpells for achievement; give skills when reading a few books; fixed rare seed sleeping bug; don't randomly rotate runestone after load; fix too big bloodstain collision; prevent critters stepping up on arrows etc; dominus identifies items properly; improved the 't' in the font.<br>4 May 2026: fixed an egregious load game bug.

More information<br>Updated 9 days agoStatusReleasedCategoryGame modPlatformsWindowsRatingRated 5.0 out of 5 stars

(12 total ratings)<br>AuthorKweepaGenreRole PlayingTagsDungeon Crawler, Fangame, First-Person, Immersive, Remake, Retro, Singleplayer, underworld, UnityAI DisclosureAI Assisted, Code

Download<br>DownloadUUBuild4May2026.zip 426 MB

Install instructions<br>You will need a copy of the original game, for example from GOG.

Unzip, then run the executable. It will ask you for the path to the GOG files, or find them automatically.

Development log<br>Unity Underground devlog #12 - first pass kb/m done 9 days ago

Unity Underground devlog #11 - mage run fixes 17 days ago

Unity Underground devlog #10 - achievement fixes 23 days ago

Unity Underground devlog #9 - a plethora of bug fixes 24 days ago

Unity Underground...