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Eureka is in ALPHA. Make sure to back up your world. There will be bugs.
Eureka is a simple add-on for Valkyrien Skies that fits with vanilla aesthetic and is easy and fun to use.
Build and design your own ship out of ordinary (or modded!) Minecraft blocks, place a Ship Helm, shift + right-click, assemble, and watch your creation suddenly infuse with physics. No longer are your Minecraft builds bound to remain forever static, sitting in the same place for all eternity.
Dependencies
Note: Eureka comes with an integrated dependency downloader that will do all the hard work for you! Just download the Eureka JAR file and launch the game.
- Kotlin For Forge (Forge users only)
- Fabric API (Fabric users only)
- Fabric Language Kotlin (Fabric users only)
- Mod Menu (Fabric users only)
All Versions
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[1.20.1-forge-1.6.3] [Forge 1.20.1] v1.6.3
by rubydesic on Oct 13, 2026
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No changelog was specified.
[1.20.1-fabric-1.6.3] [Fabric 1.20.1] v1.6.3
by rubydesic on Oct 13, 2026
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No changelog was specified.
[1.20.1-forge-1.6.2] [Forge 1.20.1] v1.6.2
by rubydesic on Oct 13, 2026
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[1.20.1-fabric-1.6.2] [Fabric 1.20.1] v1.6.2
by rubydesic on Oct 13, 2026
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No changelog was specified.
[1.20.1-forge-1.6.1] [Forge 1.20.1] v1.6.1
by rubydesic on Oct 13, 2026
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# Fixes
- Fixed wrong url for forge issueTrackerURL. [3592a20](https://github.com/ValkyrienSkies/Eureka/commit/3592a20b554e00e3c97f72390b96d77d28a3d747)
- Fixed wrong url for fabric homepage. [9ea958b](https://github.com/ValkyrienSkies/Eureka/commit/9ea958b432c79bf23e9e7e7fd9beae4393ee3a4f)
- Fixed creative inventory tab incorrect translatable key. [#490](https://github.com/ValkyrienSkies/Eureka/issues/490)
- Fixed bug where helms could be counted incorrectly. [5d38c67](https://github.com/ValkyrienSkies/Eureka/commit/5d38c678ca8809509b137a1371f26d56c00bf28c)
- Fixed fabric configs events not being registered. [#491](https://github.com/ValkyrienSkies/Eureka/issues/491)
[1.20.1-fabric-1.6.1] [Fabric 1.20.1] v1.6.1
by rubydesic on Oct 13, 2026
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# Fixes
- Fixed wrong url for forge issueTrackerURL. [3592a20](https://github.com/ValkyrienSkies/Eureka/commit/3592a20b554e00e3c97f72390b96d77d28a3d747)
- Fixed wrong url for fabric homepage. [9ea958b](https://github.com/ValkyrienSkies/Eureka/commit/9ea958b432c79bf23e9e7e7fd9beae4393ee3a4f)
- Fixed creative inventory tab incorrect translatable key. [#490](https://github.com/ValkyrienSkies/Eureka/issues/490)
- Fixed bug where helms could be counted incorrectly. [5d38c67](https://github.com/ValkyrienSkies/Eureka/commit/5d38c678ca8809509b137a1371f26d56c00bf28c)
- Fixed fabric configs events not being registered. [#491](https://github.com/ValkyrienSkies/Eureka/issues/491)
[1.20.1-forge-1.6.0] [Forge 1.20.1] v1.6.0
by rubydesic on Oct 13, 2026
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# Changes
- Updated target Valkyrien Skies to 2.4.5 [#483](https://github.com/ValkyrienSkies/Eureka/pull/483)
[1.20.1-fabric-1.6.0] [Fabric 1.20.1] v1.6.0
by rubydesic on Oct 13, 2026
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# Changes
- Updated target Valkyrien Skies to 2.4.5 [#483](https://github.com/ValkyrienSkies/Eureka/pull/483)
[1.20.1-forge-1.5.4-beta.3] [Forge 1.20.1] v1.5.4-beta.3
by rubydesic on Oct 13, 2026
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No changelog was specified.
[1.20.1-fabric-1.5.4-beta.3] [Fabric 1.20.1] v1.5.4-beta.3
by rubydesic on Oct 13, 2026
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No changelog was specified.
[1.18.2-forge-1.5.4-beta.1] [Forge 1.18.2] v1.5.4-beta.1
by rubydesic on Oct 13, 2026
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# Additions
- Allow floaters and balloons on non eureka ships to function. [95eabc9](https://github.com/ValkyrienSkies/Eureka/commit/95eabc914f2463bec933ae00f196dcd70152d197)
- Added config
allowFloatersAndBalloonsOnNonEurekaShipsdefault value true. - Added config
passiveBalloonMinHeightdefault value 64. - Added config
passiveBalloonMaxHeightdefault value 400.
- Remove duplicate linearBaseSpeed config. [13c5899](https://github.com/ValkyrienSkies/Eureka/commit/13c5899e305346046a293e82a852e95934038b59)
baseSpeedwas removed.linearCasualSpeedwas renamed tolinearBaseSpeedto make it clearer.- Floater buoyancy changes [38e7940](https://github.com/ValkyrienSkies/Eureka/commit/38e79406cad6ae1436ccf8bcddfcaf0489531506)
- Renamed
floaterBuoyantFactorPerKgtofloaterBuoyantLift, set its default value to2000from3333(scaled), and removed a "divide by 15" instruction from it. - Default
maxFloaterBuoyantFactorchanged from1.0to0.1 - Allow seats to be 0.5 blocks below the helm. [99f5ce0](https://github.com/ValkyrienSkies/Eureka/commit/99f5ce0081cd239af680ac66b83e8bc52fa4f608)
- Fixed maxBalloonsPerEngine not working while player is on helm. [13c5899](https://github.com/ValkyrienSkies/Eureka/commit/13c5899e305346046a293e82a852e95934038b59)
- Fixed mod-icon missing from fabric [5f50e26](https://github.com/ValkyrienSkies/Eureka/commit/5f50e260f997f0ff96d5ad59b30306d60af136b4)
[1.18.2-fabric-1.5.4-beta.1] [Fabric 1.18.2] v1.5.4-beta.1
by rubydesic on Oct 13, 2026
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# Additions
- Allow floaters and balloons on non eureka ships to function. [95eabc9](https://github.com/ValkyrienSkies/Eureka/commit/95eabc914f2463bec933ae00f196dcd70152d197)
- Added config
allowFloatersAndBalloonsOnNonEurekaShipsdefault value true. - Added config
passiveBalloonMinHeightdefault value 64. - Added config
passiveBalloonMaxHeightdefault value 400.
- Remove duplicate linearBaseSpeed config. [13c5899](https://github.com/ValkyrienSkies/Eureka/commit/13c5899e305346046a293e82a852e95934038b59)
baseSpeedwas removed.linearCasualSpeedwas renamed tolinearBaseSpeedto make it clearer.- Floater buoyancy changes [38e7940](https://github.com/ValkyrienSkies/Eureka/commit/38e79406cad6ae1436ccf8bcddfcaf0489531506)
- Renamed
floaterBuoyantFactorPerKgtofloaterBuoyantLift, set its default value to2000from3333(scaled), and removed a "divide by 15" instruction from it. - Default
maxFloaterBuoyantFactorchanged from1.0to0.1 - Allow seats to be 0.5 blocks below the helm. [99f5ce0](https://github.com/ValkyrienSkies/Eureka/commit/99f5ce0081cd239af680ac66b83e8bc52fa4f608)
- Fixed maxBalloonsPerEngine not working while player is on helm. [13c5899](https://github.com/ValkyrienSkies/Eureka/commit/13c5899e305346046a293e82a852e95934038b59)
- Fixed mod-icon missing from fabric [5f50e26](https://github.com/ValkyrienSkies/Eureka/commit/5f50e260f997f0ff96d5ad59b30306d60af136b4)
[1.19.2-forge-1.5.4-beta.2] [Forge 1.19.2] v1.5.4-beta.2
by rubydesic on Oct 13, 2026
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No changelog was specified.
[1.19.2-fabric-1.5.4-beta.2] [Fabric 1.19.2] v1.5.4-beta.2
by rubydesic on Oct 13, 2026
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[1.20.1-forge-1.5.3-beta.4] [Forge 1.20.1] v1.5.3-beta.4
by rubydesic on Oct 13, 2026
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Added upper limit on vs version for Forge. (eg. gives a descriptive error when using vs2.4.0 when not compatible)
[1.20.1-forge-1.5.3-beta.3] [Forge 1.20.1] v1.5.3-beta.3
by rubydesic on Oct 13, 2026
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[1.20.1-fabric-1.5.3-beta.3] [Fabric 1.20.1] v1.5.3-beta.3
by rubydesic on Oct 13, 2026
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[1.19.2-forge-1.5.3-beta.2] [Forge 1.19.2] v1.5.3-beta.2
by rubydesic on Oct 13, 2026
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No changelog was specified.
[1.19.2-fabric-1.5.3-beta.2] [Fabric 1.19.2] v1.5.3-beta.2
by rubydesic on Oct 13, 2026
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No changelog was specified.
[1.18.2-forge-1.5.3-beta.1] [Forge 1.18.2] v1.5.3-beta.1
by rubydesic on Oct 13, 2026
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# Additions
- Added resourcepack for retro helms (fabric) [bb3d60a](https://github.com/ValkyrienSkies/Eureka/commit/bb3d60afa14331d65a64d76ff417264329b5f27b)
- Added a config option that makes balloons require engines for a ship to fly. [#433](https://github.com/ValkyrienSkies/Eureka/pull/433)
- Added Spanish (Mexico) localization. [#481](https://github.com/ValkyrienSkies/Eureka/pull/433)
- Updated zh_cn translation [#474](https://github.com/ValkyrienSkies/Eureka/pull/474)
- Optimized and reworked ship liner control. [3620967](https://github.com/ValkyrienSkies/Eureka/commit/36209670dd35ead8505eb72eb6eb3fa1678ff2ac)
- Fixed some texts not being translatable [4bebf43](https://github.com/ValkyrienSkies/Eureka/commit/4bebf43f98659bc8bfce2b367032042ed367d451)
[1.18.2-fabric-1.5.3-beta.1] [Fabric 1.18.2] v1.5.3-beta.1
by rubydesic on Oct 13, 2026
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# Additions
- Added resourcepack for retro helms (fabric) [bb3d60a](https://github.com/ValkyrienSkies/Eureka/commit/bb3d60afa14331d65a64d76ff417264329b5f27b)
- Added a config option that makes balloons require engines for a ship to fly. [#433](https://github.com/ValkyrienSkies/Eureka/pull/433)
- Added Spanish (Mexico) localization. [#481](https://github.com/ValkyrienSkies/Eureka/pull/433)
- Updated zh_cn translation [#474](https://github.com/ValkyrienSkies/Eureka/pull/474)
- Optimized and reworked ship liner control. [3620967](https://github.com/ValkyrienSkies/Eureka/commit/36209670dd35ead8505eb72eb6eb3fa1678ff2ac)
- Fixed some texts not being translatable [4bebf43](https://github.com/ValkyrienSkies/Eureka/commit/4bebf43f98659bc8bfce2b367032042ed367d451)
[1.20.1-fabric-1.5.2-beta.4] [Fabric 1.20.1] v1.5.2-beta.4
by rubydesic on Oct 13, 2026
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No changelog was specified.
[1.20.1-forge-1.5.2-beta.3] [Forge 1.20.1] v1.5.2-beta.3
by rubydesic on Oct 13, 2026
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No changelog was specified.
[1.20.1-fabric-1.5.2-beta.3] [Fabric 1.20.1] v1.5.2-beta.3
by rubydesic on Oct 13, 2026
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No changelog was specified.
[1.19.2-forge-1.5.2-beta.2] [Forge 1.19.2] v1.5.2-beta.2
by rubydesic on Oct 13, 2026
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No changelog was specified.
[1.19.2-fabric-1.5.2-beta.2] [Fabric 1.19.2] v1.5.2-beta.2
by rubydesic on Oct 13, 2026
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No changelog was specified.
[1.18.2-forge-1.5.2-beta.1] [Forge 1.18.2] v1.5.2-beta.1
by rubydesic on Oct 13, 2026
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# Additions
- Added/fixed french translation [#381](https://github.com/ValkyrienSkies/Eureka/pull/381)
- Added block tags for assembly blacklist [#413](https://github.com/ValkyrienSkies/Eureka/pull/413) *(tag available here
data/vs_eureka/tags/blocks/assemble_blacklist.json)*
- Stability decreases with high speed on low mass [#371](https://github.com/ValkyrienSkies/Eureka/pull/371)
- Cleansed the blacklist config [#413](https://github.com/ValkyrienSkies/Eureka/pull/413) *(for now the blacklist config is still supported, use blacklist block tag instead)*
- Added IWoodType interface for improved compatibility [#410](https://github.com/ValkyrienSkies/Eureka/pull/410)
- Improved fuel compatibility [#406](https://github.com/ValkyrienSkies/Eureka/pull/406)
- Fixed seed bug [#441](https://github.com/ValkyrienSkies/Eureka/pull/441)
- Fixed particle issue [#441](https://github.com/ValkyrienSkies/Eureka/pull/441)
[1.18.2-fabric-1.5.2-beta.1] [Fabric 1.18.2] v1.5.2-beta.1
by rubydesic on Oct 13, 2026
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# Additions
- Added/fixed french translation [#381](https://github.com/ValkyrienSkies/Eureka/pull/381)
- Added block tags for assembly blacklist [#413](https://github.com/ValkyrienSkies/Eureka/pull/413) *(tag available here
data/vs_eureka/tags/blocks/assemble_blacklist.json)*
- Stability decreases with high speed on low mass [#371](https://github.com/ValkyrienSkies/Eureka/pull/371)
- Cleansed the blacklist config [#413](https://github.com/ValkyrienSkies/Eureka/pull/413) *(for now the blacklist config is still supported, use blacklist block tag instead)*
- Added IWoodType interface for improved compatibility [#410](https://github.com/ValkyrienSkies/Eureka/pull/410)
- Improved fuel compatibility [#406](https://github.com/ValkyrienSkies/Eureka/pull/406)
- Fixed seed bug [#441](https://github.com/ValkyrienSkies/Eureka/pull/441)
- Fixed particle issue [#441](https://github.com/ValkyrienSkies/Eureka/pull/441)
[1.20.1-forge-1.5.1-beta.3] [Forge 1.20.1] v1.5.1-beta.3
by rubydesic on Oct 13, 2026
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# Additions
- Added Engine boost. (Having multiple engines will increase efficiency)
- Added config
engineBoost - Added config
engineBoostOffset - Added config
engineBoostExponentialPower - Added config
speedMassScalefor changing how mass affects max speed. - Added Korean Localization.
- Updated helm model.
- Updated
en_pt.json - Updated helm hitbox.
- Changed anchor blast resistance from 1200 to 6.
- Halved the mass effect on max speed.
- Updated dependencies.
- Fixed an issue where the helm GUI lost data.
[1.20.1-fabric-1.5.1-beta.3] [Fabric 1.20.1] v1.5.1-beta.3
by rubydesic on Oct 13, 2026
Download
# Additions
- Added Engine boost. (Having multiple engines will increase efficiency)
- Added config
engineBoost - Added config
engineBoostOffset - Added config
engineBoostExponentialPower - Added config
speedMassScalefor changing how mass affects max speed. - Added Korean Localization.
- Updated helm model.
- Updated
en_pt.json - Updated helm hitbox.
- Changed anchor blast resistance from 1200 to 6.
- Halved the mass effect on max speed.
- Updated dependencies.
- Fixed an issue where the helm GUI lost data.
