Several years ago (I honestly don't remember when, although it must have been at least 5 years ago, probably more), I received a Desura key for a game. It was a meld of minigolf and an FPS with the framing narrative involving you being a worker (owner?) of a minigolf facility on the coast where an invasion of pirate zombies or ghosts was happening. I remember the first bit of the game had you doing a minigolf challenge on the courses, whereupon you were set upon by your first undead. As I recall it, there was a general shooting function where you just kind of fired at a point with a golf ball (I think the conceit might have involved a pneumatic tube delivery?) and then the other "weapon" choices were various golf clubs that gave you a way to set the power and angle of the shot. I never made it past the first level or so, and in 2015, Desura collapsed, which means I no longer have access to that game.
I've done a few searches for related terms, but haven't found anything. Some part of me wants to make it Nordic... maybe Vikings instead of pirates? But there was definitely an FPS setup with golf as part of the weapons.