Most browser battleship games keep the fight on a flat grid. Sea Strike adds a third dimension — press one key and your warship dives beneath the waves, press another and it surfaces to open fire.

This 3D naval combat game puts you in command of warships across three multiplayer modes: competitive PVP, cooperative escort missions, and wave-based defense with upgradeable fortifications. With three independent weapon slots, a dive/surface mechanic that changes how every engagement plays out, and real-time combat against other players, it goes well beyond the classic guess-and-shoot formula.

Play this free browser game on PLRun right now with no download. Sea Strike is a 3D multiplayer battleship game built in Unity WebGL and released in February 2026 by a developer known as Tom.

Rather than placing ships on a grid and taking turns, you pilot a warship from a third-person perspective in real time — steering through open water, managing depth, aiming weapons manually, and reacting to threats from every direction. The action is closer to a naval combat sim than a traditional Battleship adaptation.

Three distinct modes give this free online game its replay value. PVP Battle pits you against other players in ranked combat where positioning and weapon management outweigh raw aggression. Escort Mode shifts the focus to teamwork, requiring your squad to protect a moving vessel against converging enemy forces.