The player then has the option to form a tribe of Sims if the relationship is strong enough. After arriving on the island, the Sim is reunited with some of their lost crew. Shortly after exploring Shipwreck Island, the Sim discovers a second island, Airplane Island, this one considerably larger and more interesting than the first, and builds a raft to reach the new location. The Sim finds books detailing the goals the Sim must follow to survive on the islands and escape. The player's starting Sim wakes up on First Beach on Shipwreck Island. After the crew's creation, a slide-show starts of some mobile phone pictures that are taken showing the trip and also showing the storm that wrecks the ship. The game begins on a boat after the player creates a crew of characters. It is the final game released in the series for both the PS2 and PSP.

A roughly similar game, The Sims Castaway Stories, is available for personal computers, but is not a direct port of Castaway. It is also available on mobile phones Nokia offered Castaway on the Ovi Store. The Sims 2: Castaway is the third console spin-off of the life simulation video game The Sims 2 for the Wii, Nintendo DS (NDS), PlayStation 2 (PS2) and PlayStation Portable (PSP).

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