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Starlight Mario: Underworld

Hack of Super Mario Bros.


A sequel to Starlight Mario consisting of 12 brand-new levels (3 worlds), along with new custom music and animations. Mario has found himself in a dark realm and must retrieve the skeleton key before it’s too late.

Level names:

  • 1-1: The Dead Lurks
  • 1-2: Darkness Falls
  • 1-3: After the Storm
  • 1-4: Battlefield of Bones
  • 2-1: Skulls & Rust
  • 2-2: Fire Trials
  • 2-3: Spider Sprint
  • 2-4: Land of the Damned
  • 3-1: Spring Into Fire
  • 3-2: Forbidden Factory
  • 3-3: Through the Catacombs
  • 3-4: The End Is Near

Note: None of the warp pipes can be entered.

ROM / ISO Information:

  • Database match: Super Mario Bros. (World)
  • Database: No-Intro: Nintendo Entertainment System (v. 20210216-231042)
  • File SHA-1: EA343F4E445A9050D4B4FBAC2C77D0693B1D0922
  • File CRC32: 3337EC46
  • ROM SHA-1: FACEE9C577A5262DBE33AC4930BB0B58C8C037F7
  • ROM CRC32: D445F698



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ContributorType of contributionListed credit
PattyGraphicsTitle screen, BG objects, color palette
HellfireGraphicsMario graphics
ValoGraphicsAnimated graphics
Eden GTOriginal HackingASM work, secret levels designer
StudsXOriginal HackingASM work

User Review Information

User Reviews
Quality levelsdiablo66629 Oct 20221.0Yes