XLink Kai is a method developed by Team-XLink for online play of certain System Link compatible video games, it enables players on various consoles, including The PlayStation 2 (PS2), a home video game console that was developed by which company?
XLink Kai:  It enables players on the Nintendo GameCube, PlayStation 2, PlayStation 3, PlayStation Portable, Xbox and Xbox 360 to play games across the Internet using a network configuration that simulates a local area network (LAN). PlayStation 2: The PlayStation 2 (PS2) is a home video game console that was developed by Sony Computer Entertainment.
Sony Computer Entertainment