Wild Walker thrusts players into a grim, post-apocalyptic world infested with zombies across its 5x3 reels and 25 paylines. The game's core mechanic revolves around an expanding wild zombie on the first reel, which locks in place and moves one reel to the right with each respin. Triggering the free spins bonus unleashes a multi-level feature, where more expanding zombie wilds appear on new reels, progressively unlocking additional reel sets and offering increasing win potential. This high-volatility slot challenges players to survive the undead horde for big payouts.