Open the command console in-game by pressing ShiftCtrlC. Put the testing cheats on and use the casfulleditmode cheat to do that. 50 Best Sims 4 Mods Of 2018 You Absolutely Can T Miss Page 14 Best Sims Sims 4 Sims 4 Mods If they arent part of your household you would have to be on the same lot as the sim. How to add sims to household cheat . How to do you enter cheats in The Sims 4. To do this you need to open up the cheat dialogue box by clicking ctrl shift c on your keyboard then type in testingcheats true into that box and hit enter. You can also add Sims youve made and saved previously or downloaded from other players by clicking an icon in the top right corner navigating to your library. Open Cheat Box. Type testingcheats on without the apostrophes. When you are playing The Sims 4 on either Xbox or Playstation you also have access to cheats. After enabling more cheats you can also activate Interaction Cheats by holding shift and clicking on Objects and Sims. Y