There are a few ways to delete Sims in the game. The easiest way is to use the “Delete Sim” command from the Sims 4 launcher. This will delete all of your Sims, regardless of whether they are currently playing or not. If you want to delete a specific Sim, you can use the “Remove Sim” command from the launcher. This will remove that Sim from your game and all of their associated data. Finally, you can use the “Cancel Play” command to stop all Sims from playing and then delete them using the “Delete Sim” command.