Which PS1 title’s lore tied into other franchises?

[killamch89]

The original PlayStation era was full of interesting crossovers and shared-universe experiments. I’m looking to discuss the PS1 game whose story or worldbuilding most effectively connected to another franchise be it a direct crossover, subtle Easter eggs, or shared mythos. Did the Final Fantasy VII numeric system hint at other Square worlds? Or maybe Xenogears nodding to Final Fantasy themes?

[Scorpion]

For lore tying into other franchises, Marvel vs. Capcom: Clash of Super Heroes on PS1 is ideal. It directly pulled characters from Marvel Comics and diverse Capcom game series, explicitly intertwining their distinct universes within its fighting game world.

[killamch89]

Xenogears' connection to Final Fantasy through shared themes, terminology, and Yasunori Mitsuda's musical motifs created a fascinating pseudo-shared universe - while not officially connected, the philosophical depth, religious symbolism, and narrative complexity felt like spiritual successors that enriched both franchises through thematic resonance rather than direct crossover.