Press Shift + Ctrl + C to open the cheat menu and enter one of the following codes there:
kaching: get $1,000
motherlode: get $50,000
move_objects on/off: move and delete things or Sims
forcetwins: twin birth
aging on/off: turn on/off aging
maxMotives: all needs on the lot to full
motiveDecay on/off: turn on/off motive decay
aspirationPoints #: add aspiration points
lockAspiration on/off: turn on/off aspiration decay
aspirationLevel #: set aspiration level (from 0-5)
Sethour #: set time (from 0-23)
RoofSlopeAngle #: set the slope angle of a roof (from 15-75)
clear: clear all cheats on the screen (codes are still in effect)
exit: closes cheat window
vsync on/off: increase game performance
help -all: list cheat commands
StretchSkeleton: make your sim larger or smaller
slowmotion #: the game in slow motion (from 0-8)
deleteAllCharacters: (neighborhood view) remove every Sim from the neighborhood
TerrainType desert/temperate: (neighborhood view) select terrain type