Furry Killer casts the player as a protagonist fighting hordes of hostile furry creatures in arena battles. Its core loop centers on surviving successive waves, with combat framed around quick reflexes and choosing how to handle each encounter. The arena setting gives the action a focused, wave-based structure rather than a story-led journey.
Defeated enemies provide coins, which can be spent on weapon upgrades. The game also presents a selection of weapons with distinct abilities and strengths, giving players options for shaping their firepower and responding to different enemy types. This pairing of combat rewards and arsenal choices makes progression part of the action, not just a matter of enduring longer.
An endless mode pushes the wave format further, with enemies growing more challenging over time and the test shifting toward skill, endurance, and tactical decisions. Its central appeal is the combination of escalating fights, coin-funded upgrades, and weapon variety.