Duelist Arena is a two-player card game where players take on the role of captured soldiers battling in an arena to earn their freedom. Each turn, players secretly select a weapon card to attack with, each with different damage, range, and recharge attributes. Damage is calculated based on these attributes, and the player who reduces their opponent's life points to zero first wins. Players keep a combat log to track used cards and strategize. The fast-paced gameplay focuses on strategy within a simple set of rules.