Star Force, a popular arcade game of its era that’s loved by so many. Outside of Japan it was known as “Mega Force”. The game was developed by Tehkan. It was also ported to the NES by Hudson Soft, and became known as one of the best shooters on the system.
The core is currently not available via update all and has been released by a developer called madoov.
You can grab the core from the link below
https://github.com/madoov/MiSTer-StarForce
Also check out the developers X account
This core also supports an additional game called Baluba-louk no Densetsu. The MRA file for this game is not in the GitHub release but can be obtained from the PCN discord server. An invite link along with a direct link to the MRA file are below.
https://discord.com/channels/1166475109477920878/1190931492986171452/1396910844146618551