Fall into Minecraft’s Ruins, meet the real Undertale cast, and choose fight or mercy.
A solo Undertale adventure inside Minecraft: Java Edition. Fall onto golden flowers, meet Flowey, follow Toriel through nine rooms, solve two puzzles, and encounter Froggit, Whimsun and Napstablook before Toriel’s final test.
Hybrid battles keep the Minecraft world visible while your red heart dodges enemy attacks. Use FIGHT, ACT, ITEM or MERCY; your choices lead to three endings. SAVE stars, finite food and retries support your journey.
Requires Minecraft: Java Edition and an installed Windows Undertale copy. Original Undertale sprites and music are read from your own installed game at launch; none are included in the download. Windows 10/11 x64; single player. The portable Prism instance uses Minecraft 1.21.1 with Fabric 0.19.5.
A small original mashup chapter, with new Minecraft architecture, dialogue and attack patterns. Undertale content: Toby Fox and the game’s credited contributors. Minecraft: Mojang Studios. Launcher: Prism Launcher contributors (GPL-3.0); Fabric: FabricMC contributors (Apache-2.0). Built with Codex assistance and universal-modder tooling.
Version 0.1.0 verification: 55 automated behavior/content checks and live scripted story routes passed. Authenticated packaged launch/restart, physical right-click/Enter and actual Melty managed installation/launch passed, with zero failures recorded. Tested Windows Steam Undertale content; solo only. The original mod code and content use the MIT License, with remixes enabled. Complete original source and build inputs are included in the download; third-party game content and software retain their own licenses and permissions.
