Shin Megami Tensei - Demikids has your starter Mon. The very first monster you get, and your partner for the entire game, only gains levels by absorbing other monster's exp through fusion. Taking into account that you'll likely need most of your other monsters for fusion, you'll usually end up just mass fusing dozens of cheap monsters to get your starter to level up. To put it differently: This is like getting a Pikachu that has to devour its opponent every time it wins a battle. By the end of the game, your starter is essentially a walking mass of hundreds of souls.
On the other hand, if Mastema is telling the truth in the Clipped Wings DLC, there is hope for God.
A common goal of Chaos factions is a world where Might Makes Right, i.e. the strong rule over the weak. Now here's a frightening implication: What if you're handicapped/disabled, or worse, born as such? You are screwed to begin with.
Plenty in the demon's designs. The monster design brings forth references to the mythological being it's based on, to other games in the series and sometimes to pop culture as well.
Once you get over Mara's face, you should notice it riding golden chariot with many sharp blades. Then you realise it's embodiment of our dark desire - lust, greed and violence.
At first, it's weird seeing how Angel - a Divine being - is dressed in the series. It makes sense once you notice that she also wears a leash. After all, they are guardian angels that are bound to a human being on birth.
Melchizedek. By far one of the most outlandish angel designs, but makes a whole lotta sense when you think of it.
First off, he looks and acts more like some kind of Super Sentai hero than an angel. Well, he's the King of Justice. Just try saying that out loud.
Second, he's faceless. In the Bible, Melchizedek is described as "without father, without mother and without genealogy".
The series-wide interpretation of YHHV, patron of the Law path, actually makes a lot of sense if you look at it from a Japanese perspective. Unlike most Westerners, Japanese individuals have very little truck with Christianity; it is, and has always been, a tiny and easily ignored cult, rather than the huge society shaping element it is in the West. Consequently, a lot of things that Westerners look past due to subconscious indoctrination into the faith is highlit for Japanese due to the Values Dissonance. Throughout the Old Testament, God demands repeatedly the respect, reverence and worship of humanity, and in it blind obedience to God and his desires is held up as the ideal to which humanity should adhere — from the Ten Commandments, which place importance on obeying YHHV and doing what he says, to his own admission of being a jealous god. Take, for example, the infamous story of Abraham, one of the tales from the Old Testament that Christians often sweat over and which many atheists and antitheists are quick to call out. In this story, Abraham comes within a heartbeat of cutting his son Isaac's throat and making him a Human Sacrifice, only for YHHV to change his mind at the last second. And the story holds up Abraham's willingness to murder Isaac because that is what God told him as something to respect to admire, that his blind loyalty is a trait one should attempt to emulate in its fervor. In a later story in the Old Testament, YHHV fails to stop a father sacrificing his daughter in thanks for a God-granted victory, as he had promised to do. It's very easy to see why someone not culturally inclined to accept either parable as a holy tale would be able to extrapolate YHHV as the sort of monster who wishes to reduce all of creation to nothing but endless, unceasing, mindless praise of itself.
The ending of the Law path throughout the series is also a very fitting; although people have been indoctrinated to think that Chaos Is Evil and thusly Order Is Good, the truth is that an extreme of either would be awful. A world of total order would pretty much require the complete obliteration of independent thought, emotion and chance of all kinds. In fact, the Shin Megami Tensei version is actually a pretty optimistic depiction of what such a world would look like; an alternative interpretation of such a world would basically be a void. Absolute nothingness: no variation, no transformation, no creation, no destruction. Just infinite. Total. Unending. Emptiness.
The ending of Persona 2: Innocent Sin, is similar to the plot of Nocturne. In Innocent Sin, Maya's death triggers the end of the world, and then the four remaining heroes create a new world where everything went well for them. In Nocturne, the Conception requires someone with a powerful demonic sponsor, a lot of Magatsuhi, and a Reason. In Innocent Sin, Philemon was the sponsor, the protagonists produced Magatsuhi from the pain of losing Maya, and their Reason was to make a better world.