Final answer:
Without additional context, it is not possible to determine the games played at Roberto's birthday party from the information provided.
Step-by-step explanation:
The question you've asked, "Roberto had a birthday party with ten of his friends. What did they play?" lacks the necessary information for a definitive answer. It could be board games, card games, video games, or outdoor games, but without more context or detail about the party activities, it's impossible to select one of these options accurately. Moreover, the reference provided also doesn't include specific information about the games played during Roberto's birthday party, focusing instead on the swimming, food, movie, and interaction with a friend.
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