Throughout my three-year tenure with Activision, a large chunk of my contributions were towards the Call of Duty franchise—a series revered for its immersive first-person shooter experience—I've contributed significantly as a User Researcher on titles including MW3, MW2, and the eagerly anticipated Warzone Mobile (2024). My efforts in playtesting and usability testing have played a crucial role in shaping these games, each a testament to the franchise's legacy of engaging storytelling and competitive gameplay. Working alongside over 70 companies, such as Treyarch and Infinity Ward, I've helped push for exceptional player experience, contributing to milestones like MW3's groundbreaking sales and CODMobile's remarkable revenue achievements. While my work is safeguarded by an NDA, the results—a series that continues to captivate and innovate—speak volumes about our collective endeavor to elevate the player experience.