Hello.

I am searching for so long a old 3d pc game ( anventure) .

The game had 3 alien monsters which are evolving in the way of the game.

The name was like "evolution" but i am not sure.

Do anyone now this game?

The game your looking for is probably Alien Nations. You can buy it soon at http://www.gog.com/en/gamecard/alien_nations

actually the game you are looking for is Evolva