Defender III has created a strategic defense system to attract players, utilizing a simple yet highly challenging strategy genre. The game boasts vivid graphics and stunning combat effects, making each level more engaging. The main focus of the game is to develop effective strategies and promote players� strengths while also enhancing their intelligence.

In the game, players must defend their stronghold from creatures beyond the borders. Failure to do so will result in dire consequences. The primary method of defense is through legendary power crossbows. As enemies attack in waves, players must successfully destroy all attacks to win. Upgrading the magic crossbow is crucial to increasing its strength and withstanding larger waves of invasion. Players must also balance their spending to optimize their ability to upgrade.

The most powerful weapon in Defender III is the crossbow, which comes in various elements such as fire, water, earth, and wind. These can be obtained through logging in or purchasing from the store. Each crossbow has three skills that increase damage and inflict adverse effects on enemies. These moves have a cooldown timer before they can be used again, so players must strategically use them to defend and win.

As players progress through the game, levels become increasingly difficult, and they must adapt quickly. Each level offers valuable rewards, enhancing players� strategic acumen and overall ability. If players fail, they can continue playing until they win, but to reach higher levels, they must enhance their overall power through other features.

Monsters beyond the border are drawn to the energy players possess and are incredibly aggressive and dangerous to face directly. As players reach certain limits, new maps are unlocked, each with their own specific species. For example, the snowy mountain map features ice dragons and terrifying monsters.

Players must also be wary of powerful bosses that appear at crucial stages. If their damage is not enough, they risk being defeated. Upgrading plays a vital role in increasing players� power. They can upgrade their crossbows, spellbook, and secondary battle turrets to enhance their defense. With every upgrade, players become better equipped to defeat enemies in Defender III.