- Home: https://www.comunidadargentum.com/ (Spanish), https://www.ao20.com.ar/ (Spanish), https://sourceforge.net/projects/morgoao/, https://github.com/argentumonline, https://github.com/ao-libre
- State: beta, inactive since 2014
- Download: https://github.com/ao-libre/ao-cliente/releases, 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 51, @forks 44), https://github.com/ao-libre/ao-cliente.git @add (@created 2018, @stars 62, @forks 76), https://github.com/ao-libre/ao-worldeditor.git @add (@created 2020, @stars 5, @forks 11), 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, Facundo Román, Fakkerz, Franco Benito, FrancoBenito, Fredy Treboux, Gexur, Ignacio Arminas, Joaquín, Jotabe, Juan Dalmasso, Juan Martín Sotuyo Dodero, Juanmz, Lautaro Marino, Leandro Mendoza, LoreleiArgAoLibre, Lucas, Lucas Recoaro, Luciano Contartese, Marco Vanotti, Mateo, Mauro Segoviano, Natanael Andrés Garrido, Neox189, Pablo Duval, Pablo Ignacio Márquez, Pato, Pato Torres, pLuS, Redroot, ReyarB, Ronin, Samuel Fernandez, Walter Gonzalez, WalterSit0, Zaxtor
See also: spin-off, server mod.