The Sims 2: Double Deluxe is in no way different from The Sims 2 where The Sims 2: Nightlife and The Sims 2: Celebration Stuff have been added. It allows the player to do whatever they can in the Sims 2, along with the expansions in gameplay that Nightlife added.
Players can create "Sims", virtual people that are centric to the franchise, and can create homes for them. As well as building homes, the player can build public areas as well. It is also possible to create a neighbourhood, as the same as in The Sims 2 core game. The playing of the sims and the building elements of the game are split into three "modes": live mode, buy mode and build mode. In buy mode the player can select objects to fill the lot. The objects are further separated into categories. In build mode, the player constructs the basic layout of the lot by adding walls, for example. In this mode, it is also possible to landscape the lot, by adding plants, water and editing the terrain. Live mode is where the player can interact with the sim. The Sim has specific needs to be fulfilled. For adults, these needs are Hunger, Comfort, Bladdar, Energy, Fun, Social, Hygiene, Environment. The needs are represented by bars, these bards turn green, yellow or red if the levels of the needs are good or bad. As The Sims 2: Nightlife is installed, every Sim can have Wants and Fears, and Attractions. Attractions are set as the sim ages into a teenager, or are set in Create-a-Sim. Wants and Fears are determined by the aspiration the sim is given. The Sims 2: Double Deluxe has 6 aspirations and a joke aspiration, grilled cheese, which can only be accessed by using an aspiration reward. Children have the Aspiration "Grow Up" until they are Teenagers, when the player can decide one of the following: Pleasure, Family, Romance, Knowledge, Wealth, Chef and Popularity.