Extreme Popularity
Press "Ctrl," "Shift," and "C" at the same time, during gameplay, while in a house or lot. Type "boolprop testingcheatsenabled true." Then click on the mailbox while holding "Shift" and a box will pop up. Choose the "More" option and then "Neighborhood." Click on the options "Make friends for me" and "make me know everybody." Everyone will be your friend and you will receive a constant stream of phone calls from people wondering why you don't talk to them anymore.
Improve Skills and Needs
Bring up the console window by pressing "Ctrl," "Shift," and "C" together in the middle of gameplay, when you are in a house or lot. Enter "boolProp testingCheatsEnabled true." Change to a different household. You can now change a Sim's needs or skills by clicking on the slider bar and dragging it up or down. So if you need some new skills to gain promotion at work, move that slider to the top on you will be more than qualified.
Neighborhood Changes
While in a house or lot, press the keys "Ctrl," "Shift," and "C" together during gameplay to bring up the console window. Enter "boolprop displayNeighborhoodRoads false" to take away the roads from your neighborhood. Type "boolprop displayNeighborhoodFlora false" in the console window to remove every flower or plant from the neighborhood. To remove water, such as ponds, from your neighborhood, type "boolprop displayNeighborhoodWater false" into the command window.
Extra Money
Enter the command window as stated in all previous sections. Type the code "Kaching" (capitalized) for 1,000 simoleons, which is currency in all "Sims" video games. If that still isn't enough, enter the code "motherlode" (no capital letter) to receive 50,000 simoleons. You can use these cheats as many times as you like.
Other Cheats
Go into the command window as noted above and enter the code "StretchSkeleton(X)" but replace the "(X)" with a number; normal height for each sim is 1.0 so a lower number shrinks a Sim and a higher number lengthens him. Type in "aging off" and none of your sims will age another day. To slow time enter "slowMotion(X)" but replace the "(X)" with a number from 0 to 8, with 8 being extreme slow motion and 0 being normal. If one of your Sims is expecting a child, type "twinzr2cute" for her to have twins.