- FM Synthesis (OPN2) Music Now Available! - 5 September 2026
This update includes the following changes:Added FM synthesis (OPN2) versions of the musicAdjusted the sound effect volume balanceChanged the Steam Input integration methodAdded RESET to the pause menuAdded a CONFIG menu to the title screenImproved the CRT filterAdded automatic notch avoidance on macOSWorked around keyboard input issues on macOS/LinuxOverhauled the rendering systemFM Synthesis (OPN2) Versions of the MusicIn addition to the original music (VGS versions), we have added FM synthesis versions using the OPN2 sound chip.Enjoy the game with the rich, immersive sound of the YM2612 (OPN2), part of the FM synthesis lineage found in the Sega Genesis/Mega Drive and arcade hardware.The FM synthesis audio is not prerecorded. The highly accurate open-source ymfm emulator generates digital waveforms, which are then processed in real time by our own analog emulation system.To develop th…
- Battle Marine Advance! Is Coming Soon! - 22 July 2026
The GBA version currently included as a bonus with Battle Marine is coming to Steam as a standalone title: Battle Marine Advance!Battle Marine Advance! uses Dewpoint Advance to connect the GBA game with Steamworks.It preserves the original gameplay experience while adding support for Steam leaderboards and achievements.Key FeaturesReplay-enabled leaderboards that let you watch the runs behind submitted scoresSteam AchievementsPlay the GBA version of Battle Marine directly on SteamPrice and BundleThe planned price is $0.99.We also plan to offer a bundle containing Battle Marine and Battle Marine Advance! at a 15% discount.If you already own Battle Marine, you can save on Battle Marine Advance! by purchasing it through the bundle.About Dewpoint AdvanceDewpoint Advance is an emulator frontend that connects custom GBA games with Steamworks features such as leaderboards and achievements.http…
- [Windows Update] Audio Playback Issue Fix - 17 February 2026
An issue has been identified in the Windows version of Battle Marine where audio may occasionally stop playing during gameplay.Additionally, when this issue occurs, the game may take longer than expected to fully close.This update implements a fix for the above problem.■ Issue DetailsIn the Windows version, audio may occasionally stop playing during gameplay.When this occurs, the game may take longer to terminate properly.■ CauseThe issue was traced to a Windows-specific audio handling problem related to the DirectSound implementation.■ Affected PlatformsWindows version onlyThe macOS and Linux versions are not affected.As a result, this update applies to the Windows version only.We apologize for any inconvenience this may have caused. Thank you for your continued support of Battle Marine.
- Grant Notarization to the app (macOS only) - 18 December 2025
In this update, we have applied Apple’s official notarization to ensure safe launching on macOS.This helps prevent issues such as the app failing to launch or security warnings appearing after future macOS updates.
- Compatibility Improvement Update - 16 December 2025
We have released an update focused on improving compatibility on macOS and Linux.macOSSupport for Intel-based Macs has been discontinued. The game now supports Apple Silicon only.The executable format has been changed from a single binary to a macOS application bundle (.app).Code signing has been applied to the application.Dependency on the shared SDL2 library has been removed and replaced with a statically linked SDL2.The location for log files and configuration files has been moved from the installation directory to Steam’s User Data Folder.As a result of this change, configuration settings have been reset to their default values.LinuxDependency on the shared SDL2 library has been removed and replaced with a statically linked SDL2.Dependencies on libgcc_s.so and libstdc++.so have been removed and replaced with static runtimes.The location for log files and configuration files has been…
- Original Sound Tracks available! - 8 June 2025
Original Sound Tracks for each model version of Battle Marine were created.The tracks are available for free on YouTube.
- Play GBA version on the SteamDeck - 2 June 2025
The GBA version is also playable on SteamDeck. You need getting the RetroArch from the Steam Store. https://store.steampowered.com/app/1118310/RetroArch Also needed the mGBA core. https://store.steampowered.com/app/1227448/RetroArch__mGBA/ However, you must first copy the ROM files under /home/deck as follows: Switch to desktop mode. Launch the desktop Steam client. Find the ROM file in the “Browse local files” section of Battle Marine. Press Y to copy the ROM file Go to your home document. Press the X button and tap the "Paest" soft key. We have written this article to help you if you want to play only with SteamDeck, although we do not think you will have any doubts if you are using a PC.
- GBA version added - 31 May 2025
A GBA version of Battle Marine (ROM file) has been added as a purchase bonus for the Steam version of Battle Marine. The GBA version of Battle Marine can be played on an emulator such as mGBA. https://mgba.io/ If you have a GBXCart RW and the corresponding Flash ROM cartridge (32KB FRAM or SRAM required), you can also play on the actual device. GBA ROM files can be found in the Steam client by opening “Browse local files” under “Manage”. A detailed description of the GBA version is given in README-en.txt in bmarine_gba.zip. Have fun!
- Battle Marine for GBA coming soon! - 23 May 2025
We will soon be updating Battle Marine to distribute the ROM file of the GBA version of Battle Marine as a bonus for purchasing the game on Steam. The GBA port is coming along very nicely and is ready for release once the ending and balance adjustments are completed. We will probably be able to update the game by the end of June 2025. The distribution method will be the same as the GBA version of Battle AirForce and will be made available without additional charges. https://store.steampowered.com/news/app/3476490/view/547857372725379988
- Support for SteamDeck - 27 February 2025
We have confirmed that when playing with SteamDeck, there is line noise on the screen when the screen filter is enabled, so we have made a correction to turn off the screen filter in the default settings on new installations.
- Battle AirForce to be released in April 2025 - 29 January 2025
Battle AirForce, a vertical-scrolling bullet-hell STG set three years after Battle Marine, is scheduled for release in April 2024. https://store.steampowered.com/app/3476490/Battle_AirForce/ This title is an orthodox vertical scrolling barrage STG, but you may find evolution from Battle Marine in many places. We are planning a 40% off release sale for the first week after release, so if you are interested, please register your wish list.
- Supports Apple Silicon - 18 January 2025
Previously, Battle Marine failed to start on Macs with Apple Silicon due to SDL2 runtime dependency issues, but by statically linking SDL2, it can now be started successfully.
- Rapid auto fire & Changed default GPU - 9 April 2024
Support Rapid Auto-Fire (Windows, Linux, macOS) Added shot firing function for keyboard input. The c key is assigned by default. It can be customized to any key with CTRL+K (Windows) or config.json (Linux/macOS). bugfix: Keyboard configuration does not saved (Windows) A bug in the Windows version that caused keyboard assignment settings to be reset to default settings after rebooting, has been addressed. Changed default GPU (Linux) The default GPU at startup has been changed from OpenGL to Vulkan. In environments where Vulkan is not available, OpenGL is used as before. In environments where OpenGL is not available, software rendering can be used by specifying the startup option: -g None Changed default GPU (macOS) The default GPU at startup has been changed from OpenGL to Metal. On environments where Metal is not available, OpenGL is used as before. On environments where OpenGL is not a…
- Support configuration for Linux and macOS - 6 April 2024
Fixed a problem that could cause rendering errors in some environments. Fixed a problem that could cause a crash during ELF relocation. Fixed a problem that could cause a crash when exiting the game Customization of behavior settings is now supported. How to customize the operation settings When you launch Battle Marine after this update, a configuration file called config.json will be generated. The config.json file is saved under the directory opened by opening the Battle Marine page in the Steam client and selecting "Settings Icon" > "Manage" > "Browse local files". You can customize the following items: graphic.isFullScreen: true = full screen, false = window mode graphic.isScanline: true = with screen effects, false = without screen effects gaphic.windowHeight: height of the screen in window mode gaphic.windowWidth: width of the screen in window mode sound.volumeBgm: Volume of back…
- Friend Score Ranking, Quick Restart and other - 4 March 2024
The following features have been added 1) In-game display of friend score ranking Friend score rankings can now be displayed from "SCORE RANKING" in the title. Note: Non-ASCII code strings will be replaced with "? in the title. 2) Restarting the game when pausing is now possible. When pausing during a game, you can now select RESUME (restart the game) or RESTART (start the game over from the beginning). 3) ON/OFF toggle for scan line screen filter (*on Windows only) It is now possible to toggle the screen scanline filter ON/OFF by pressing CTRL+L or the menu item "Screen" -> "Toggle ScanLine filter".
- Update for Windows - 29 February 2024
The following update was made to the Windows version only 1) Fixed issue with faster than 60Hz displays. Because the game was always controlled by the vertical synchronization of the screen (V-SYNC), the game would run faster when played on a display with a faster screen refresh interval, such as 144Hz. Note1: The fix is to adjust the timing by V-SYNC as before when the screen refresh interval is 60Hz, and by Sleep in other cases. Note2: This problem should not occur on Linux and macOS because they always use Sleep to adjust timing. 2) Added volume sliders for background music and sound effects. The volume balance of background music and sound effects can now be adjusted by CTRL+V or "Sound" -> "Volume Control" in the menu.
- Added leaderboard for friend ranking - 28 February 2024
We have released a version that supports leaderboards where you can compete with your friends in the Steam community for scores.
