Impossible Creatures is one of the best games i've ever played. If I could I would rate it 20 out of 10.
It is my favourite game, especialy because of the concept of combining 2 animals and creating a new 1. There are also some preset army's and a campain.
The game also allows you to ally with other players and is very like the Age Of Empires Games.
I give this game a 5 star rating