Because of this, there is no direct storyline for the Sims. Not only that, but every single aspect of the game can be customized, from houses to pets, careers, even family lineages! There is not one aspect of The Sims 4 that the user cannot make their own. The user can let their imagination run free by creating Sims and houses of their own choosing. The Sims 4 for Windows is a computer game that allows the user to build a unique world of their own creation.