In parallel with the rapid growth of the digital games market, the modding phenomenon has been gaining momentum. Mod culture, a manifestation of the convergence and the remix cultures, emerges as a way to adapt digital games to the needs of their players and incorporate content from other media, such as books, movies, or series, into the game world. This systematic literature review aims to discuss the ethical considerations of modding by understanding its impact on the overall gaming experience and comprehending how players and game companies perceive and respond to modders’ motivations. 15 studies from various scientific fields were analysed. Overall, mods impact the gaming experience in a variety of ways, ranging from educational purposes to deeper social concerns. While modders find motivation to create mods stemming from a myriad of reasons, including leisure and self-improvement, the stance taken by game companies, gaming communities, and players tends to discourage them from developing new mods and deter new modders who aspire to contribute with creative content. In conclusion, it remains important to recognise that specific ethical dilemmas linked to mod culture require in-depth debate to reach a consensus. Furthermore, other aspects demand more stringent scrutiny to ensure that we can all benefit from the enriching playground of personal experimentation and exploration that modding offers in this contemporary era of convergence.