To improve your shooting accuracy, practice aiming for headshots, use weapons with better stability, and adjust your sensitivity settings in the options menu for more precise control.

In Zombie Frontier 3, you can unlock various types of weapons such as rifles, shotguns, and pistols. Each weapon has unique stats and upgrades that affect performance in combat.

To upgrade your weapons, go to the weapon menu, select the weapon you want to enhance, and then choose the upgrade option. This usually requires in-game currency or items obtained from missions.

To defeat tougher zombie bosses, it's crucial to stay mobile, use cover efficiently, and focus on damaging weak points. Utilize grenades or explosives to inflict maximum damage when possible.

Earning more in-game currency can be done by completing missions, participating in special events, and selling unused weapons or items you find during gameplay. Regularly check daily challenges for extra rewards.