You can enter the "Create a Sim" mode cheat by typing testingcheats true into the cheat console. This will enable a variety of cheats, including the ability to create a Sim.
Here's a step-by-step guide:
- Open the cheat console: Press Ctrl + Shift + C (PC) or Command + Shift + C (Mac) during gameplay.
- Type the cheat: Enter testingcheats true into the cheat console and press Enter.
- Enter Create a Sim mode: Once the cheat is enabled, you can access Create a Sim mode by clicking on the "Manage Worlds" button in the bottom-right corner of the screen.
This cheat will allow you to create Sims, customize their appearance, and edit their traits and skills.
Note: This cheat is available in all The Sims games, including The Sims 4.