Siege of Paris is the second expansion for Assassin's Creed Valhalla. For this project, Calvin worked as a quest designer, being placed in charge for most of the side content and the entirety of Chapter 2.

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In detail, the work Calvin did on Siege of Paris are as follows:
 

• Placed in charge of the Roman Excavation side quest, Frankish Nobles world bosses, World Moments (Ghost of St Germain & The King of Rats) and Rebel Mission system
   
• Worked on all three of the Chapter 2 quests, including the Little Mother blackbox
   
• Collaborated with people of multiple different disciplines to ensure that everyone was aligned upon the needs of the quests, while being made aware of the creative intent behind each choice and decision
   
• Constantly addressed feedback from playtests and leads, communicating with the rest of the team to refine the content together