Europe is witnessing increasing protests against mining. Social movements mobilizing against resource extraction projects, (i.e. anti-extraction movements) are typically heterogeneous actor networks using diverse tactics to stop projects and promote other forms of societal development. I investigate two prominent anti-extraction movements in Sweden and explore how movement actors’ goals and interpretations of contextual opportunities shape their strategies and tactics. I study tactics over eleven years and use frame analysis to explore actors’ goals, interpretations, and strategies. Results show how diverse goals (...) lead to diversification of tactics in movements by prompting movement actors to relate to different policy areas, that is, issue-specific contexts. Furthermore, actors’ experiences of interacting in different issue-specific contexts created differences in actors’ retrospective reasoning, which reinforced variation in tactics by informing interpretations of contextual opportunities. The study contributes to social movement theory by explicating how the content of goals shape interpretations of contextual opportunities and by extension diversify movement actors’ strategies and tactics. This adds to the understanding of how socio-political context influence tactical choices in concert with other explanations such as action traditions, diffusion, and available resources. Understanding diversification of movement tactics is important for handling increasingly complex conflicts over natural resources. (shrink)