There are a lot of Cheats out there that don't work for The Sims, and ones that are Obselete. This section will contain cheats that are known to work in all expansions. This is not a complete list of the working ones. Have a cheat you want me to put on here? E-mail me Here.
Cheat Window Cheats
How to Bring up the Cheat window
Press Control,Shift, and C at the same time to bring up the window.
rosebud
What it does:Gives you $1000
Description:The most used cheat in Sims. Typing this in once will give you $1000.
!;
What it does:Repeats Previous Cheat Code
Description:Instead of typing in Rosebud 5 times, !;!;!;!;!; will do the same thing. Use this to accumulate money quickly.
prepare_lot
What it does:Resets the lot
Description:This really isn't a cheat. Actually, you use this to get a lot working again. It can be used to Revive portals, get Sims out of a certain situation, bring Sims home... Stuff like that.
move_objects
What it does:Allows you to Move objects that normally can't.
Description:With this code, you can Move Sims if they are taking a shower, Move Sims if they are doing something, Get Rid of Annoying NPCs, Delete objects in use... move_objects on turns it on while move_objects off turns it off.
map_edit
What it does:Changes the boundaries of the property.
Description:You can either use this to restrict or extend the Territory you can place objects, build walls, etc. without Move_objects on. Map_Edit on turns it on while Map_Edit off turns it off.
nessie
What it does:Forces Nessie to appear on a Neighborhood Screen (Comes with UL, Nessie appears on Vacation Island, Downtown and the Neighborhood)
Description:If you've never seen Nessie, or want to see nessie again, type in this cheat.
autonomy
What it does:Increases or Decreases the reliance on The Player
Description:Autonomy starts out at 50. If you enter autonomy 0, they will not do anything unless you tell them to. If you enter autonomy 100, they will be smarter and take care of themselves more.
Other Cheats
Start Out with skills.
What it does:Allows your sim to start out with a few skills.
How to do it:Open the Create A Family Screen. Create a New Family. Then, Add a new sim. Choose the Sim to be a child, enter a name, then click done. When you are back to the Family screen, then click on the child. Turn them into an Adult then you can change their face and body. Give them a personality then click done. Repeat if you want more Sims with skills, or click Done. You'll get the message that you can't edit a family when you are done, just click ok. Make sure you give them a job, Otherwise they'll have school.
Perfect Personality
What it does:Gives a Sim 10 Personality points in every stat.
How to do it:This requires LL for the Potion Kit. Create a Sim with no personality. Then, put them in an empty lot and have them use the Potion Kit. Keep having them make potions until the potion is Yellow. Have them drink the potion and they will have perfect personality.