688(I) Hunter/Killer is a submarine simulation game developed by Sonalysts, a company known for designing simulators for the US Navy. The game places players in command of a submarine, requiring them to manage over 12 detailed operating stations to control sonar, weapons, and navigation. Gameplay incorporates real-world terrain data derived from satellite topographical information, enhancing the simulation's authenticity. Players can engage in training exercises, single missions, a campaign mode, and multiplayer battles for up to eight participants.The simulation emphasizes comprehensive control over submarine resources, including crew training and weapons loadouts. It utilizes full 3D technology to present accurate models of over 20 naval weapon platforms and allows for multiple camera perspectives. The game recreates real-life scenarios, drawing on political analysis for its campaign structure. 688(I) Hunter/Killer aims for a high degree of realism in its depiction of submarine warfare.