Bible

The Bible is a collection of religious texts and the central book of Christianity. It is both directly quoted and alluded to multiple times in the Xeno series.

In Xenogears
The opening screen of Xenogears consists simply of white text on a black background: I am Alpha and Omega, the beginning and the end, the first and the last. This quote is from Revelation 22:13 in the King James version of the Bible.

The quote is used in a number of additional contexts associated with Xenogears:
 * Chapter 59 is titled 'First and Last'.
 * The Beginning and the End is a track on the Xenogears Original Soundtrack.
 * An official concert of the game's music was titled Xenogears 20th Anniversary Concert -The Beginning and the End-.
 * A rerelease of the Xenogears Original Soundtrack was titled Xenogears Original Soundtrack Revival Disc -the first and the last-.

In Xenosaga
During a sequence in Xenosaga Episode I, Joachim Mizrahi says the following: Hallelujah! And the sea gave up the dead which were in it and death and Hell delivered up the dead which were in them: and they were judged, every man according to their works! The quote is expanded upon in Xenosaga Episode III: ...And death and Hell were cast. They were cast into the lake of fire! And with it came about the second death! And whosoever not found in the Book of Life... was cast into the lake of eternal fire! This quote is from Revelation 20:13-15 in the King James version of the Bible (slightly paraphrased).

In Xenosaga Episode I, during his speech to MOMO Mizrahi, Albedo says the following: "Except a corn of wheat fall into the ground and die, it abideth alone." This quote is from John 12:24 in the King James Bible, however it omits the last part of the verse. The verse could have been picked as a reference to Albedo's character, as the following verse 12:25 goes: "He that loveth his life shall lose it; and he that hateth his life in this world shall keep it unto life eternal." It bears a lot of similarities with how Albedo views his own immortality.

In Xenosaga: Pied Piper, Voyager and people under his control often repeat excerpts from Revelation 16 (omitting verses 13 to 16): I heard a loud voice from the temple, saying to the seven angels, ‘Go, pour out the seven bowls of God’s wrath on the earth’. So the first went and poured out his bowl upon the earth, and a foul and loathsome sore came upon the men who had the mark of the beast and those who worshipped his image. And the bowl was poured onto the sea, and it became blood as of a dead man; and every living creature in the sea died. The bowl was poured upon the rivers and fountains of waters, and they became blood. Then I heard the angel in charge of the waters say: ‘You are just in these judgments, you who are and who were, the Holy One, because you have so judged; for they have shed the blood of your saints and prophets, and you have given them blood to drink as they deserve.’ And I heard the altar respond: ‘Yes, Lord God Almighty, true and just are your judgments.' And the bowl was poured on the sun, and power was given to it to scorch men with fire. And men were scorched with great heat, and they blasphemed the name of God who has power over these plagues; and they did not repent and give Him glory! Then the fifth angel poured out his bowl on the throne of the beast, and his kingdom became full of darkness; and they gnawed their tongues because of the pain. They blasphemed the God of heaven because of their pains and their sores, and did not repent of their deeds. And the bowl was poured on the great river Euphrates, and its water was dried up, so that the way of the kings from the East might be prepared... Then the seventh angel poured out his bowl into the air, and a loud voice came out of the temple of heaven, from the throne, saying, ‘It is done!’ And there were noises and thunderings and lightnings; and there was a great earthquake, such a mighty and great earthquake as had not occurred since men were on the earth. Now the great city was divided into three parts, and the cities of the nations fell. And great Babylon was remembered before God, to give her the cup of the wine of the fierceness of His wrath. Then every island fled away, and the mountains were not found. And great hail from heaven fell upon men, each hailstone about the weight of a talent. Men blasphemed God because of the plague of the hail, since that plague was exceedingly great.

In the Underground Ruins in Xenosaga Episode III, where T-elos is fought, an inscription is written on the floor which MOMO translates as: And the angel answered and said unto the women, fear not ye: for I know that ye seek Jesus, which was crucified. He is not here: for he is risen, as he said. This quote is from Matthew 28:5-6 in the King James version of the Bible.

In Xenoblade Chronicles X
The White Whale was built as an ark ship. When Elma explains this in the Lifehold Core, Gwin asks if it's similar to Noah's Ark.

In Xenoblade Chronicles 2
Each of the Trinity Processor cores is associated with a Bible verse, inscribed in Latin on the processor's housing next to the core.
 * Ontos's verse is Proverbs 3:13: "Beatus homo qui invenit sapientiam et qui affluit prudentia" ("Blessed is the one who finds wisdom, and the one who gets understanding").
 * Logos's verse is Proverbs 10:12: "Odium suscitat rixas et universa delicta operit caritas" ("Hatred stirs up conflict, but love covers over all wrongs").
 * 's verse is Proverbs 4:18: "Iustorum autem semita quasi lux splendens procedit et crescit usque ad perfectam diem" ("The path of the righteous is like the morning sun, shining ever brighter till the full light of day").

Allusions

 * The Xenosaga character Jesus is heavily based upon Jesus Christ, the central figure of the Bible's New Testament. Likewise, Mary Magdalene is based upon the figure of the same name.
 * The Xenoblade Chronicles 2 music track Drifting Soul references Jacob's Ladder from Genesis 28.