The 2023 PC and console gaming landscape was defined by a strategic pivot toward new title launches, which commanded 50% of top advertising expenditures compared to only 20% the previous year. While established live-service giants like Fortnite maintained the highest individual ad spend at $57 million, new AAA releases such as Hogwarts Legacy and Diablo IV dominated the market through concentrated, multi-platform campaigns. Marketing budgets increasingly diversified across a broader media mix; although YouTube remained the primary channel with 35% of spend, platforms like TikTok, Instagram, and Over-the-Top services captured significant market share by utilizing short-form video content to drive engagement. Success in the AAA sector relied on distinct promotional philosophies tailored to specific business models. Diablo IV leveraged a live-service framework and extensive open betas to generate $666 million in five days, while Starfield utilized its inclusion in Xbox Game Pass to balance traditional sales with subscription-based accessibility. Marketing tactics for these titles ranged from long-term anticipation building to high-frequency social media accolades. Conversely, franchises facing critical headwinds, such as Call of Duty: Modern Warfare III, shifted their focus from celebrity-driven advertisements to influencer-led content and innovative cross-media partnerships with film and music icons to sustain momentum despite declining initial sales. The industry also witnessed the growing power of transmedia synergy and organic virality. The Fallout television series demonstrated the potential of cross-media adaptations by triggering a sixfold increase in mobile downloads and renewed interest in the legacy franchise. Similarly, Honkai: Star Rail illustrated how mobile-first spending can successfully drive multi-platform engagement. However, the emergence of titles like Lethal Company and PalWorld proved that traditional high-budget marketing is not the only path to success, as viral gameplay and creator-driven interest can achieve millions of sales with minimal advertising investment. This evolution highlights a market where massive corporate spending and organic digital trends coexist as primary drivers of commercial performance.