Armored Core: Master of Arena is a 1999 third-person shooter mecha video game developed by FromSoftware for the PlayStation. Master of Arena is the third entry in the Armored Core series and a direct sequel to Armored Core: Project Phantasma. It is the final game in the original Armored Core trilogy. The game was not released in Europe. An indirect sequel, Armored Core 2, was released on August 3, 2000, for the PlayStation 2.

Armored Core: Project Phantasma is a 1997 third-person shooter mecha video game developed by FromSoftware for the PlayStation. Project Phantasma is the second entry in the Armored Core series and a prequel to the original Armored Core. The game was not released in Europe.