- .hack leads Kite and BlackRose are in The World when they run into Tron Bonne from Mega Man Legends and Xiaomu from Namco X Capcom who are lost in cyberspace
- .hack characters BlackRose and Kite can logout in Project X Zone
- Kurt and Riela from Valkyria Chronicles 3 are soldiers from the 1930s
- these two meet characters from the Sakura Wars games since they are from the Taisho time period
- Yuri and Estelle travel to an alternate dimension where they cross swords with Sanger Zonvolt from the Super Robot Taisen series