To tell you the truth, I tend to play videogames more for their story than for game play. The following is a list of symbolism and references made in the Devil May Cry series which I have noticed...

Things to come: Greyon, Beowulf, Cerberus

  ± A lack of a God figure
Since there is always talk of the "Prince of Darkness", Mundus, there is no mention of a God figure in the series. In The Divine Comedy, God and Jesus are never mentioned by name, but are referred to by allusion. The reason for this is because it is considered to be one of the punishments of hell.

  ± Tower of Babel & the Temen-ni-Gru
In the Bible, Genesis 11 1-9, there is something called the Tower of Babel. It is a tower built by humans so that they could make a name for themselves as if they were God. As a result, God stopped this project by giving them different languages and scattering them throughout the land. The Tower of Babel is considered to be a Mesopotamian Ziggurat. They were meant to be literal stairways to heaven. In other words, it was meant to serve as a link between heaven and Earth.

The Temen-ni-Gru was built by people who worshipped demons so that they could join the human world with the demon world as they were seeking to have demon power for their own. However, the tower and the gate to the demon world were closed and sealed by Sparda.

  ± Temen-ni-Gru & the Nine Circles of Hell
If you see images of the basic outline of Dante Alighieri's concept of hell, you may notice that it is tower like. The Temen-ni-Gru may not exactly have Nine levels, but the way the tower is shaped looks reminiscent to Alighieri's concept of hell but flipped upside down. When viewing it that way, the higher up you go, the closer one is to their destination.

  ± Trish as Beatrice, Lucia as St.Lucia, and Lady?
Trish probably represents Beatrice, someone who Dante sees as being the ideal woman, in The Divine Comedy. Lucia's name is probably derived from St.Lucia in the Divine Comedy. St.Lucia was the messenger of Virgin Mary to Beatrice to have Virgil acts as a guide for Dante through hell.

  ± Vergil's Lack of Speach
In The Divine Comedy, because of superstitious reasons, Virgil's spirit cannot speak until spoken to. Since the Devil May Cry series is loosely based on The Divine Comedy, perhaps the creators of the series put that into account when it came to Vergil's reluctancy to speak and Nelo's Angelo lack of speach, or maybe they just wanted to continue to make Vergil the opposite of Dante. In Devil May Cry 3: Special Edition, if you try taunting using Nelo Angelo he sometimes does speak. So perhaps there's an inconsistancy here.

  ± Nelo Angelo's Face in Devil May Cry 3: Special Edition
So, you may have noticed that Nelo Angelo's face in Devil May Cry 3: Special Edition has weird lines on it. As if they were put there as a joke? Well, it is. As mentioned in Note of Naught, the team randomly added those lines on his face as a cross reference to Nelo Angelo's helmet.

  ± Vergil's Symbolistic Coat & Nelo Angelo's Symbolistic Cape
Vergil likes vague symbolism so much that he literally drapes it over his shoulders. On Vergil's blue coat you may notice a thorn vine motif, and on Nelo Angelo's cape there is a vine-like symbol. Vines symbolize intoxication, frenzied lust, and so forth. Thorns, those associated with rose bushes, are seen to emphasize opposites. In this context, it'd be Vergil being the opposite of Dante.

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