I guess this belongs in this child board: a skirmish game with Fistful of Lead rules and a sci-fi setting?
I'm a great fan of Peter F Hamilton's books, and ever since I read The Chronicle of the Fallers I've been wanting to use it as the setting for a game.
In the book, large eggs regularly fall down from space on a planet. After landing on the planet, the eggs exert a strong attractive force on the creatures living on the planet. When a creature is drawn towards the egg and touches it, it is stuck. The trapped creature is then "eggsumed". It is slowly absorbed by the egg and transforms into a perfect copy (a Faller), which is under the control of the Faller hive mind and is much stronger than the original.
The people inhabiting the planet try to destroy an egg as soon as it lands, but of course they sometimes are too late. Society is slowly infiltrated by the Fallers who try to have influential people eggsumed in order to help taking over the planet.
In our game the trajectory of an egg has been tracked to a remote countryside location on Earth. An MiB team which happened to be in the area is dispatched to secure the egg before it eggsumes someone or a Faller coven can get to it. It will then later be collected by a special egg recovery team for further research. A nearby Faller coven is however also en route to the egg and plans to have an influential politician, who was abducted by another faller coven, eggsumed.
The Faller Egg:

The Faller coven spreading out to stop the MiB:

Men in Black moving towards the Fallers:

Men in Black getting killed:

In the end the MiB team got wiped out and the Fallers secured the egg. All is not lost however because they haven't been able to get the politician they abducted to the egg yet...
More on my blog:
https://toomuchterrain.blogspot.com/2022/08/mib-vs-fallers-part-1.html T.