Released as the very first expansion pack (EP01), Get to Work added depth to the simulator by focusing on professional life. It introduced three main active careers:

Ensure the version of the DLC in the ZIP file matches your base game version. If they are mismatched, the game may fail to launch or throw a "Script Call Failed" error.

EP01 brought Aliens back to the Sims. They can live in disguise among humans or be discovered through the Scientist career.