Codename: Outbreak is a tactical 3D-shooter game set in a near-future scenario where players must combat an alien invasion threatening humanity. The game features a total of 14 single-player missions packed with action, allowing players to immerse themselves in a storyline that revolves around an ex-Ukrainian combat group member. The gameplay focuses on tactical shooting mechanics, providing a blend of strategy and fast-paced action as players navigate through various challenges and enemies.

In addition to the engaging single-player mode, Codename: Outbreak also offers a multiplayer option, enabling players to team up with friends over a LAN connection. This feature enhances the cooperative gameplay experience, allowing players to strategize together against the alien threat. The game's graphics and mechanics create an immersive atmosphere, making it appealing for fans of the action genre.