It is possible with an 3-party tool which is not supported by EA and they won't give you support if it messes up.
That said, I use a tool (mostly for managing two languages on the same computer and other perks). Google AnyGameStarter 3 if you want to go down that road.
There's no official way supported by EA.
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You could leave it installed though and turn off the SN beings and the full moon in the options. That way you won't have Zombies or SN and only have the objects in your game to place.