In The Sims series, a game over occurs when there are no more playable Sims in a household. This can be caused by death, or when there are only children living after adults or teens die.
In The Sims, there is no game over screen and the lot remains played. All modes are available.
The Sims 2Edit
The Sims 2 introduced a game over screen featuring various dialogues of the Grim Reaper known as The Finale. After the last Sim dies, time is paused and the player loses control of Live Mode. The lot is still playable in Build and Buy Mode, and the remaining funds the household had are still usable.
The Sims 3Edit
The Sims 3 has a game over screen known as The End.... Clicking on the checkmark brings the player to Neighborhood View.
The Sims 4Edit
The Sims 4 lets the player have two options after the last Sim dies. The player can save and continue to play with the world or return to the Main Menu without saving.