The ancient viking board game of Hnefatafl, though partly lost to time, can potentially give us great insight into viking culture, through its strategic play-style. In this paper, we aim to formalize the Fetlar rule set for Hnefatafl and develop multiple strategic approaches to the ancient board game of Hnefatafl. Through consultation with seven players of the game, we, with their help, propose four unique attacking strategies and five defending strategies for Hnefatafl. Through these strategies we explore how the game of Hnefatafl was meant to be played, and what values it may teach us about viking society. While our understanding of Hnefatafl is not complete, our research proposes that the game may be a tale of an epic battle against foreign aggressors unfolding on the game board. Through this analysis, we hope to build a foundation for future Hnefatafl research, hopefully allowing for the creation of greater strategies or even achieving perfect gameplay.