UPDATE : Looks like this game was released after all under name Deo Gratias on PC.
Thanks to Red for mentioning it in comments.
French game studio Cryo Interactive is known for many great games including Dune, Atlantis or Millenium. Intervention was planned as a strategy game. Such genre was at that time (1997) very popular.
Intervention was planned with a bit different game mechanic. There was no gold, oil or valuable minerals to harvest and there was no conquering of enemy land. It was all about gods and worshipping. You are playing as a god and your first goal was to create universe, stars and planets. Planets could be changed to meet your ideas and plans. Creating animals and plants and then humans. Then you need to take care of people living there and when they dont worship you enough , you can release an earthquake or plague. Amount of you god like status is important and definws your skill level in game. When you are strong enough with many worshippers behind, you can attack another gods. Multiplayer was planned through internet and using LAN. It was planned to be able to play with as many as 100 players on internet, something very ambicious for that time.
It is not known to me why it was cancelled, and only a few screens and one video exists on the web.
If you know about any other materials or info about this game please let us know.