- Home: http://www.newbreedsoftware.com/gemdropx/, https://packages.debian.org/search?keywords=gemdropx
- Inspiration: Tetris
- State: beta, inactive since 2002
- Download: http://www.newbreedsoftware.com/gemdropx/download/
- Platform: Linux, macOS
- Keyword: puzzle
- Code language: C
- Code license: GPL-2.0
- Code dependency: SDL
- Developer: Bill Kendrick
Placing gems in vertical lines destroys them and ultimately leads to completion of a level. It has been compared to "Tetris meets Space Invaders".