Sims 2
Some fun things to do on the Sims 2:

1. Make a Legacy (here is a great site: link)

2. Turn your sims into Aliens/Vampires/Werewolves/Plantsims, etc (

3. Make an Apocalypse (link)

4. Do a challenge (link)

5. Write a sims story/or video and post it to a community (link,link link, link)

Sims 2