Ok so I've been trying to find an old pc game, I don't remember much of it but I remember that the player had to fight many monsters, I remember the scenery to be a graveyard (first location) (I don't remember later ones) but I do remember the first weapon which was a automatic spinning glave basically this gun but with a glave (like the one on the pic) attached to the front (it was spinning pointing the blade to the sky not towards the enemy tho, hope this will give you the slightest clue.
Source: https://www.reddit.com/r/oldgames/comments/1275vvn/old_game_ive_been_trying_to_find/