Part make-believe, part soap opera, The Sims is all about fun and entertainment and socializing with friends both real and created. In The Sims game, you create simulations of persons and events and have your creations, or Sims, interact with one another and with the world around them.
In the game, you begin with a small amount of money and a vacant lot on which you would build a home and then create Sims who live in that home. These Sims will have some autonomous free will to interact with the items around them, although you as the player can override those actions. These Sims need to perform certain tasks for the game to continue; as an example, you need to maintain a balanced budget. This means at least one of your Sims will need to have a job and an income, and the interactions of the Sims will cost money as the game goes on. If they date or have children, this will mean more money. When you purchase new items for which they may interact, this too requires money from the budget.
The Sims also need lots of attention from you, the player. If you ignore or neglect them, they may start to disobey your commands and won’t allow you to override their actions. They may also begin to get grumpy and interact poorly with other Sims. This is part of what makes the game so addictive; you need to interact with your Sims “family” just as much as they interact with each other in order for the game to continue and progress.