NES

Battle Marine

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Emulator

Frame rate: 0 FPS
Speed: 0 %
Uptime: 0:00
Controller: Keyboard

Emulated console

CPU: Ricoh 2A03 (6502), 1.79 MHz
Memory: 2 KB RAM
Video: PPU, 256×240, 54 colors
Video memory: 2 KB VRAM
Sound: 5 channels: 2 pulse, triangle, noise, DPCM
Cartridge: Mapper 0 · NROM, 32 KB / 8 KB
Emulator core: FCEUmm (EmulatorJS)

About Battle Marine

Platform: NES
Developer: Suzuki Plan
Year: 2019
Genre: Shooter
Players: 1
License: Homebrew

Suzuki Plan's naval shooter, subtitled Kaisen (sea battle), ported to the Famicom from a smartphone game with some cuts for the hardware.

Your ship sits on the surface and fires at submarines, fish and crabs while seagulls pass overhead and drop things on you. Submarines launch torpedoes when they line up with you, fish sometimes jump, and crabs fire homing shots and wrap around the screen instead of leaving, so they are best destroyed at once. Touching an enemy ends the game.

Scoring rewards careful aim: each kill is worth 10 points and adds a medal, up to 15, plus a bonus of ten times your medal count, but a missed shot halves the medals.

The Famicom version is written in 6502 assembly and its source is published under GPLv3. Battle Marine was also made for Suzuki Plan's VGS-Zero platform, and a Game Gear cartridge based on that version came out in September 2024. A sequel, Battle AirForce, was announced for Steam in January 2025.

How to play

Controls: The D-pad moves the ship, A or B fires.

Facts

A Famicom port of a Suzuki Plan smartphone game, released with source code under GPLv3.
Kills are worth 10 points plus ten times the medal count; misses halve the medals.
A Game Gear cartridge ported from the VGS-Zero version came out in September 2024.
The sequel Battle AirForce was announced for Steam in January 2025.

Cartridge

Mapper: 0 · NROM
PRG / CHR: 32 KB / 8 KB
Mirroring: Vertical
Saves: No

40,976 bytes · CRC32 8CC87739 · MD5 3f05ede5d4bf5b17bc0c3cd664303487

Keyboard controls

D-pad: ← ↑ ↓ →
A: Z
B: X
Start: Enter
Select: V

Steam Controller

D-pad: D-pad
A: A
B: B
Start: Start
Select: Select

Xbox controller

D-pad: D-pad
A: A
B: B
Start: Menu
Select: View

DualSense controller

D-pad: D-pad
A: ✕
B: ○
Start: Options
Select: Create

Keys and controller buttons can be remapped with the Controls button under the game. Save and Load keep a snapshot of the game in your browser. Steam Controller works as a gamepad through Steam Input. On phones, on-screen buttons appear.