- Home: https://www.comunidadargentum.com/ (Spanish), http://www.argentumonline.com.ar/ (Spanish), https://sourceforge.net/projects/morgoao/, https://github.com/argentumonline, https://github.com/ao-libre
- State: beta, inactive since 2014
- Download: https://www.comunidadargentum.com/descargas/, https://sourceforge.net/projects/morgoao/files/
- Keyword: role playing, 2D, multiplayer online + massive
- Code repository: https://github.com/ao-libre/ao-server.git (@created 2018, @stars 40, @forks 39), https://github.com/ao-libre/ao-cliente.git @add (@created 2018, @stars 52, @forks 62), https://github.com/ao-libre/ao-worldeditor.git @add (@created 2020, @stars 3, @forks 8), http://morgoao.cvs.sourceforge.net/ (cvs)
- Code language: Visual Basic
- Code license: GPL-2.0, AGPL-3.0
- Developer: abusiv0, Alejandro Santos, Alexis Caraballo, Amraphen, AOSecProj, Borouse, BoxStar, BrianPr, cucsijuan, Cuicui, Fakkerz, Franco Benito, FrancoBenito, Fredy Treboux, Gexur, Ignacio Arminas, Joaquín, Jotabe, Juan Dalmasso, Juan Martín Sotuyo Dodero, Juanmz, Lautaro Marino, Leandro Mendoza, LoreleiArgAoLibre, Lucas, Luciano Contartese, Marco Vanotti, Mateo, Mauro Segoviano, Natanael Andrés Garrido, Neox189, Pablo Ignacio Márquez, Pato, Pato Torres, pLuS, ReyarB, Ronin, Samuel Fernandez, WalterSit0, Zaxtor
See also: spin-off, server mod.