This study examines the brand experience design of two game expansions, "The Witcher 3: Blood And Wine" and "Cyberpunk 2077: Phantom Liberty," by CD Projekt Red (CDPR) through the lens of Actor-Network Theory (ANT). It assesses how these expansions position themselves within the gaming market and contribute to the commercial success of the games. This analysis delves into CDPR’s branding and marketing strategies, discussing the broader applicability of ANT within the gaming industry. This paper aims to contribute new insights into digital media, game design, semiotics, and marketing strategy, thereby enriching the field of game development and brand management.This paper investigates how these expansions create semiotic links with their original game worlds and influence the gaming experience, impacting players' cognitive and emotional responses. Moreover, it explores how these design elements interact within the broader network of game ecosystem actors, such as players, developers, and the market, identifying factors that contribute to the expansions' market success. The study interprets the semiotic elements of character design and world-building in each expansion, analyzing their integration with the game's narrative. Through ANT, it examines how these elements interact with other components within the game to enhance narrative depth and player engagement. The paper also analyzes how new content communicates with the existing fan base and attracts new players, playing a crucial role in market penetration and expansion.