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.

Defense Mode turns the experience into a wave-based survival challenge where building and upgrading fortifications between rounds matters as much as shooting.

Each mode trains a different skill set, and the dive/surface mechanic runs through all of them as a central tactical tool. Navigate your warship with W to move forward and S to reverse. Turn left and right using A and D.

What separates Sea Strike from most naval browser games is the depth axis: press K to dive underwater and I to return to the surface.

This vertical movement is central to the game — diving lets you avoid incoming fire and reposition while submerged, but you need to surface to use your main weapons. Press C to cycle camera views for better situational awareness during chaotic firefights.

Your ship carries three separate weapons, fired independently with Numpad 1, Numpad 2, and Numpad 3. Each weapon slot appears to serve a different combat role — likely varying in range, fire rate, or damage type — though specific loadouts may depend on the warship you select.

Managing all three rather than mashing a single fire button is a core skill: the right weapon at the right range makes the difference between a clean kill and wasted ammunition during a critical engagement. PVP Battle Mode is the core competitive experience.