Nearly every expansion adds community lots that need to be in your town in order to be able to access all the features of that expansion: dog & cat parks for Pets, bars for Nightlife, etc.
Where can I get a list of all the lot types needed in order to have access to every feature, as well as all the careers and rabbitholes?
Best Answer
The rabbitholes are as follows:
(Source: The Sims Wiki)
Many of them only supply jobs, but if you're counting that as a "feature", then you need all of them.