Open your Sim's relationship screen with the testing cheats enabled and change your relationship with another Sim by dragging the meter with your mouse until it is full. This cheat allows you to alter your relationship level with any Sim your active Sim has met. The only downside to using this cheat is that you have no control over the age of the friends you make, so you could potentially make friends with elder Sims who end up dying soon after. You can perform this cheat multiple times to obtain more friends.

Select the option 'Make Me Friends.' This enables your active Sim to instantly obtain the friendship level with a few randomly selected Sims. With the testing cheats enabled, press 'Shift' and click on your mailbox. Now that your Sim knows all characters, he can invite them to parties, talk to them on the phone or hang out to build better relationships.

This cheat will make your active Sim at the acquaintance level with every other Sim character in the game that he has not already met. The process will take a few moments as there are several characters to process. Select the option 'Make Your Sim Know Everyone' to enable the cheat. Enable the testing cheats, hold down 'Shift' and click on your Sim's mailbox. Use this cheat to have your active Sim instantly know every character in town. To turn off these cheats, type 'testingcheatsenabled false.' Know Everyone When a text box appears, type 'testingcheatsenabled true' and press 'Enter.' You must have the testing cheats enabled to use any of the cheats involving relationships. Some Windows Vista users may need to also hold down the Windows key when bringing up the cheat console. To enter cheat codes for 'The Sims 3,' you must first bring up the cheat console by holding down the 'Control,' 'Shift' and 'C' keys at the same time.

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