"Not to be confused to JackO GMD!"

Country South Korea
Age Unknown
Levels 23 total levels with 34 creator points.
Other Info
Crew Was in GS
Position 67 (Creators)
YouTube Channel [1]

MaJackO is a Geometry Dash creator, well known for creating notorious levels like Stereo Demoness and Back on Mountain, as well as participating in several collabs like Resident Evil and The Ultimate Phase.  

He is also well-known for introducing the "Core" themed levels, most of them are including GrindCore and MetalCore. He has a YouTube channel but hasn't uploaded anything.  

Popular Levels

  • Silent Hill
  • Stereo Demoness
  • Back on Mountain
  • GW Russia
  • Theory of EX v2
  • Apologiest
  • Higgs
  • Triangle Out
  • Silent Hill v2
  • Dark Matter
  • Anti Matter
  • Treasure Mine
  • Hello Demon
  • MetalCore
  • 8Bit Core
  • GrindCore
  • DuoCore
  • DeathCore
  • TranceCore
  • EmoCore
  • MaJackOs Cosmos
  • Future Demoness

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