The structure of the game is an agent-based artificial life program. The presentation of the game's artificial intelligence is advanced, and the Sims will respond to outside conditions independently, though often the player's intervention is necessary to keep the Sims on the right track. The Sims technically has unlimited replay value, in that there is no way to truly win the game, and the player can play indefinitely. It has been described as more like a toy than a game.
