To launch a rocket with a neighbor, you should meet the following requirements:
1. You should be neighbours in the game.
2. Both of you should have a launch pad and Mission Control Center of the same kind.
3. Both of you should have the four completed collections for a launch of this rocket.
4. One of you should start a launch, and the other one should choose the friend in the launch start window. To do that, one should charge the collection, click on Start, choose the neighbor in the appearing window by clicking on the avatar of the player, and then click on the Join option.
Then you will prepare for a launch together by gathering the necessary items.
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