After you find Cloud in the hospital after he falls in the Lifestream, he will mumble incoherent things when you speak to him. One of the things he mumbles is "zeno... gias..." This is a translation error and a reference to the game Xenogears. In the PC port of Final Fantasy VII, the spelling is corrected to "Xeno... gears".

Cloud also says "A billion mirror fragments.... small.... light..." which is a reference to the vocal song of Xenogears, Small Two of Pieces. One of the lines to the song is "Broken mirror, a million shades of light".