This paper describes the initial findings of an exploratory research project investigating the use of the cooperative digital puzzle game Keep Talking and Nobody Explodes as a means to facilitate Second Language Acquisition (SLA). A qualitative case study approach was taken to closely examine the linguistic interaction between three L2 learners of English at a Japanese university who played the game over four one-hour sessions. The findings include clear examples of learners negotiating for meaning and making use of a range of discourse strategies theorised to contribute to effective language learning within an interactionist SLA framework. By demonstrating that the learner-to-learner interaction evoked by this game can set in motion multiple processes linked to L2 development, the results suggest that the game, as well as others that make use of a similar information-gap mechanic, could be effectively put to use for language learning and teaching purposes in a variety of formal and informal educational contexts. [For the complete volume, "CALL for Widening Participation: Short Papers from EUROCALL 2020 (28th, Online, August 20-21, 2020)," see ED610330.]