This article explores the role of digital game-based language learning and teaching (DGBLLT) in second language (L2) vocabulary acquisition. It emphasizes the effectiveness of commercial entertainment games in promoting incidental vocabulary learning through engaging, multimodal interactions. The article distinguishes between receptive and productive knowledge, alongside vocabulary breadth and depth, utilizing an established taxonomy to underline the complexity of L2 vocabulary acquisition that can occur through digital gameplay. Various studies and systematic reviews are synthesized to demonstrate the positive impact of DGBLLT on L2 vocabulary learning. Despite the substantial evidence supporting DGBLLT for L2 vocabulary development, challenges remain, including the need for better access to and analysis of in-game language data and player interactions. Future research directions include refining game design principles, exploring long-term retention of word knowledge, and addressing cultural and linguistic diversity, among others. The article also calls for developing tools and methodologies for researchers to enhance our understanding and optimize the impact of digital games in L2 vocabulary learning and teaching.