#CastawayIslandChallenge #Castaway #Island #challenge . The Castaway Island Challenge is where you use the items provided on this island (you must have packs used to play challenge ) you try to survive however you can the location of this island is, Key Point in the (Sims4 Island living) pack try not to use any cheats durring this challenge that includes ( cheatcodes, Build Buy mode, and leaving the lot island ) you may swwim in the ocean around the island but not to other islands in the town.