Sims 2

The sims 2 double deluxe includes three packs: sims 2 base game, sims 2 nightlife, and sims 2 celebration stuff pack.

However, all the packs are not separate games. The sims 2 seasons, the sism 2 pets, and the sims 2 nightlife are expansion packs that add extra features to the base game. The sims 2 celebration stuff pack adds extra objects to the base game.

This means that you can enjoy all features from all the packs all at once after you install them!(Just make sure you install the base game in the sims 2 double deluxe before you install everything else~!)