At an unspecified time in the future, Earth’s resources are exhausted and habitats are no longer stable. Humans have been transferred to a new solar system, IOTA Synthetica. In this new solar system, everyone will have a stable life to develop and live. However, things began to change when a mysterious radiation source appeared. It has moved through the new solar system and brought about inanimate objects to attack mankind. From this uprising, the Galactic League has summoned the Gunnac command and demanded they protect humanity once more.
Coming to Gunnac, you will be able to control your own 1 spacecraft to fight the enemy. You must fight through 8 different stages to complete the game. Besides the diverse number of stages, the game is designed with 4 different levels (Normal, Intermediate, Advanced and Expert). In it, Normal is the simplest and easiest to experience, the movement and fighting speed of enemies at this level is relatively slow. And Expert is the most stressful level when your enemy possesses an attack speed and agile movement. This last level requires you to have quick reflexes in order to survive the onslaught of enemies. Reflections and slow movement will cause collisions with enemy warships and your spacecraft will be destroyed.
Besides, Gun-Nac is also appreciated for possessing a variety of combat weapons for players to use. There are 5 main weapons (flamethrowers, machine guns, laser guns …) and 4 different types of bombs for you to equip in each mission. In addition, the main dancers will not limit you to ammunition and you can freely attack enemies. The main weapon and 4 bomb types will be designed with circular icons for you to collect. However, the number of bombs that can be collected will be limited. To upgrade the main weapon, you need to pick up Power P dropped on the playground. When the main weapon is upgraded, your attack speed will be increased and you can shoot in many different directions to destroy enemies. As for the bombs in the game, each successful upgrade will help expand the range of damage and help you kill many enemies at once.
In addition, players are also allowed to use the money to buy equipment in the store. Shops will appear in the middle of each level to help players proceed with weapon upgrades. You can collect money when it falls on the way, rescue hostages or destroy enemies.
