While playing the game, press [Ctrl] + [Shift] + C to display the console window. Enter "boolProp TestingCheatsEnabled true" to activate testing cheats mode. This is a very powerful cheat that enables many new things. In Create A Sim, after enabling this code, go into debugmode by pressing [Shift] + N before making a Sim. You now have the following new things in Create A Sim: skin tones, clothing, and some other options such as viewing the skinfilenames. In the game itself, after enabling this code, hold [Shift] and left click on a Sim to have lots of options, such as changing clothes, make your Sim fat or thin, set their aspiration level, etc. This code also can spawn some interesting items, such as the tombstone of L(ife) and D(eath), and family members.
Enable the "boolProp testingCheatsEnabled true" code, then go onto a different family. A strange code will appear at the top right hand corner. If you go onto the Sims' needs, you can click on each one and drag it up or down, whichever desired. You can also increase the skill points of your Sims in the same way. This is useful if you want a promotion, if your Sim is depressed, if you are teaching a toddler to walk, etc. You can also hold [Shift] and click on a Sim. Click on "More", then "Spawn" and create the Tombstone of L and D. You can click on this, then "More" then "Make everyone here friends with me", which helps if you need friends to get promoted, or to complete an aspiration task.
Enable the "boolProp testingCheatsEnabled true" code, then hold [Shift] and click on a mailbox. You will now have new options, such as forcing a burglar to rob, know all Sims in the neighborhood (including NPCs and special Sims), force everyone you know to be friends, force pregnancy relations, invite all neighbors over, and more.
