Invention 3 is a small zombie shooter with a first-person view. This project came to computers from mobile devices. In the PC version, the developers slightly tightened up the picture and adapted the controls for keyboard and mouse. Compared to the previous two parts, the developers have noticeably improved the graphics. There is no full plot. You have to play as a certain special forces soldier. He appears with a pistol on the roof of a residential high-rise building and tries to get out of the city. He will have to explore this building and other buildings, walk along the city streets of an abandoned metropolis, go down the subway, and wander through the forest area. The campaign takes about one hour to complete.

The project has a longer alternative name: Invention 3 – Zombie Survival. All opponents in this game are represented by the living dead. There are no enhanced enemies or full-fledged bosses among them. Some enemies are initially located in rooms, while others appear according to scripts behind the protagonist. Adversaries attack only in close combat. The hero can only carry 2 weapons at a time. Moreover, only one of them is allowed to be replaced, and a pistol with a flashlight and endless cartridges always remains with the fighter by default. At the locations you can find a submachine gun with a silencer or a tactical shotgun. These barrels consume ammo. Ammo can also be found on maps, as well as first aid kits that restore health.