All rules from 1900s still stand with the following changes:
- War: All male Sims who are a Teen, Young Adult, or Adult at the start of this decade, and all males Sims who become a Teen during this decade, must be drafted for World War I. This includes the husbands of the daughters in your family and their male children (even if they are no longer your primary household).
- Make all the male Sims eat the Cow Plant cake once.
- For each individual Sim, roll a die – odds will eat the cake a second time, evens are sent home!
- Note: Men who are about to go to war do have the opportunity to Try for a Baby before they are called to service (so do this action before they eat the first piece of cake). This is for both the active household and for all the non-played households with your daughters.
- Heir: If ALL the male Sims in your family die in the war (whether they are in the active household or have moved out), then (and only then) your oldest daughter’s husband can become the heir.
- If he dies in the war, then move to the next oldest daughter’s husband. You must look at all the daughters who have moved out – the oldest daughter with a surviving husband must move with her entire family back into the active household and the husband will become the heir.
- If you do not have a single male Sim left in all of your entire family, then you must have the oldest daughter remarry, and her new husband will become the heir (though he’s still got to go to war too). Keep going along this line of logic until you achieve a surviving male heir.
- Traits: Any male Sim returning from war must suffer trauma and take one of the following traits the next time they age up: Gloomy, Hot-Headed, Clumsy, Erratic, Lazy, Mean, Paranoid, or Noncommittal.
- Home/Building
- Drywall/Painted Walls are allowed.
- Murphy beds are allowed.
- Education
- Teens who do not earn a C or higher in high school must be sent away to another household.
- World War I lasted Early Summer 1914 to Late Fall 1918, but the USA did not enter the war until Early Spring 1917. If your Sim wants to attend university, they may do so after they have served active duty for a minimum 8 Sim Days.
- Career
- Young Adult male Sims are not allowed to have a career until they return from war – if you have StrangerVille, then they are required to take the Military (Officer) career during active duty.
- Adult/Elder male Sims are permitted the following careers: Business (Management), Criminal (Boss), Critic (either branch), Culinary (Chef), Doctor, Education (either branch), Engineer (Mechanical), Entertainer (Musician), Freelancer (Writer), Gardener (either branch), Interior Decorator, Law (either branch), Military (Officer), Painter (either branch), Politics (Politician), Scientist, Writing (either branch).
- Women may not have a Political career, but they are encouraged to participate in activism and protests.
- Part-time work: Men can be a fisherman, lifeguard, or manual laborer. Women can be a babysitter, lifeguard, or a manual laborer. Teens and Elderly cannot have part-time work.
- Children and Teens are allowed to join the Scouting career.
- Miscellaneous
- Soccer is beginning to gain popularity in the USA and is allowed.
- Portable generators are allowed.