A continuous game, or real-time game, is a game without pauses, turns, rounds, or other stopping points.
The term is most often used to describe video games, which as of the late 1990s were almost all real-time, the shift being driven by the rapid increase in the power of personal computers. There are however a number of board games and card games that are continuous, partially in reaction to the format's popularity in video games.
The relatively new video game genre known as real-time strategy modified traditional strategy games in a way that brought public attention to the differences between real-time and turn-based games.
But the fundament of every game is decision-making--presenting a player with a situation, and requiring him to decide what to do and how to solve the problems he faces as he struggles toward a win.
Ergo, we need a game in which evolution is planned by the players, and in which they can determine when and how their creatures feed.
A game like Evolution is a constant balancing act: of course, we want to represent the creatures in the game and the nature of evolution as accurately as possible.