Final answer:
The question about Roberto's birthday party activities cannot be answered factually due to a lack of information provided in the scenario.
Step-by-step explanation:
The question regarding what Roberto and his friends played at his birthday party does not contain enough information to provide a factual answer. Therefore, I cannot confidently specify whether they played board games, card games, video games, or outdoor games. It's also important to note that this question does not pertain to an academic subject nor does it specify a grade level. These types of questions are usually hypothetical or situational and are meant for creative or critical thinking exercises rather than factual knowledge.