In this Game, SphereSub finds the Remnants of Atlantis that was left over from the Chaotic Watery Baptism that the Original Earth endured from the judgment of God.

When the morning stars sang together, and all the sons/daughters of God shouted for joy because of the creation of this earth!

Read chapter 37:7 of Job

This was the dispensation of Angels. 

How long it lasted is not recorded in the Bible. 

In the beginning, the Angels and Sons/Daughters of God were Celestial beings that were able to enjoy and share the earth with friendly Dinosaurs, Elephants and Dragons, etc... without the need of Terrestrial bodies.

Then after the rebellion of Lucifer now Satan and 1/3 of the angels that included the Sons/Daughters of God...Isaiah chapter 14, Ezekiel 28 and Revelation 12. Only the Sons/Daughters of God were now able to be both Celestial and Terrestrial beings going back and forth from Heaven to Earth, while building cities like Atlantis in the natural realm.

Then because of Satan's unwillingness to repent while weakening the nations along with the rebellious angels and the Sons/Daughters of God, God took away their wings and confined them to Terrestrial bodies only, then they became the Pre-Adamites, while roaming along side the now mostly rebellious dinosaurs, dragons and elephants etc... during the (Chaotic Earth Stage).

During the end of the Earth's First Age, while being covered with water. God took off all faithful Pre-Adamites and kept their Celestial bodies safe in the portals of Heaven.

Afterwards, God did away with His Sons/Daughters just being in their Celestial bodies and required all of them to come into a flesh body with no memory of our past. This was the consequences of 1/3 of the Angels and Lucifer tried to ascend above the Stars of God. 

This was to prepare everyone for their turn coming too life in flesh bodies like Adam & Eve living within the garden of Eden. Their bodies were much more advanced than what we have now. 

Fallen Nature- After the Fall of Adam & Eve then came, The Dispensation of Conscience

Now, receiving another down graded body after their fall in a coat of skin from God. Genesis 3:21, Think of a peach 🍑 without the pealing which is much more appealing, this was like their bodies before the fall and after their disobedience is like the outer skin with its pealing, and like what we have now.

During the end of this First Earth Age, while being covered by water during what was called Lucifer's Flood (Not Noah's Flood). God took off all faithful Pre-Adamites and kept their now once again Celestial bodies safe. 

Then God did away with His Sons/Daughters being created in their  Celestial bodies only and required them all to come into a flesh body, because of the rebellion of others. Ecclesiastes 12:7

The rebellious Pre-Adamites that were  originally in their Celestial bodies are buried under the Sea in their Terrestrial bodies waiting to be judged by God, according to their works. Revelation 20:12

And because of this rebellion, God made a decision to require all of us to be born of a woman in the flesh except for Adam & Eve. In order to make this fair for everyone, we were chosen by lots to be born in a certain  time in history and into what family during this 2nd age. The ones that took part in the rebellion against God were not given an easy opportunity to serve Christ during this flesh age but some do repent before they die physically and most will repent afterwards in the lake of fire. Those that chose not to rebel against God during the first age have a much easier time given their lives to Christ but some do not. Then there are those that are chosen to be set a part from all the rest that have to endure much more pain in this life, to prepare them for their eternal position for making sure that they will never rebel because of their status in Heaven. (Joseph of the Old Testament is a good example) for their roles during the 3rd Age. (The Perfected New Earth that will endure Forever).

Revelation 22:12 - And, behold, I come quickly; and my reward is with me, to give every man according as his work shall be.