Protect & Defense: Sci-Fi Cyberpunk is a tower defense game where you will need to build your own castle to protect the Earth from alien invaders. The game is based on the futuristic war where the aliens have attacked the Earth. The Earth is practically defenseless against the aliens and the only hope is for a hero to rise up and lead the resistance.

In the game, you will play as a commander who will need to build your own castle to protect the Earth. You will have to build and upgrade various towers such as missile launchers, laser turrets, and more. You will need to improve them by increasing their range, damage, and power.

As the commander, you will have to defend the Earth against the aliens and also against other players who may try to attack you. The gameplay is very similar to a war game where you will be able to take control of a military base.

The game has an interesting storyline where you will need to defend the Earth against the aliens and also against other players who may try to attack you.