: Kits leverage robust physics engines to handle realistic interactions, such as bullets hitting walls or characters bumping into objects.

: Basic computer-controlled "bots" that can navigate the environment, take cover, and engage the player.

A standard FPS framework, whether for engines like Unity or Unreal, typically includes several essential modules:

: Manages 3D movement, including running, jumping, and crouching. It simulates the "first-person" perspective, where the camera acts as the character's eyes, and the virtual arm and weapon remain fixed in the field of view.

Successful FPS games built using these kits often prioritize . Research suggests that the "thrill" of the genre comes from the player's ability to see only a partial, "sliced reality" through the screen, which increases tension. Additionally, sound design—often using "caricature" rather than strict realism—is used to enhance the feeling of being inside the game world.

: Defines victory and loss conditions, such as wave-based survival or point-tracking systems. The Role of Kits in Development