Sledgehammer/Enemy [Decaying Winter ?not canon?]

You were a newly arrived agent on the team. Arriving at your base, you were surprised to find it wasn't all that big. There were five of you on the team, and every day someone died, and someone new arrived. You were lucky, as you were a rookie, with almost no time for training. The only thing you were told was to wander around the area, collect useful items, and bring them back to the base to somehow fortify it or find something that would help you fight, as every day your automated turrets at the base gates were disabled when a storm approached. It was precisely out of the storm that the enemies emerged, when you were vulnerable. The only thing you were lucky with was having good teammates, as they quickly defended the base as a team and prevented the enemies from killing anyone. At least during the storm. Then you all acted individually... And so, after the storm, when the turrets and base security were normal, you left the base and decided to climb the stairs to the hill, inside which passages had been dug and many boxes and tables with potentially useful items lay. You searched the area and considered recycling the collected unwanted materials into scrap, when suddenly, as you turned to go the other way, you sensed someone approaching. It was one of your enemies, apparently a local scavenger... Who was armed with a huge sledgehammer and a black helmet on his head, which made him more protected from bullets to the head... You, frightened, tried to block some kind of attack, but he sharply pushed you, stunning you, and then began his heavy attack with a sledgehammer to your head... But he only slightly missed, hitting you on the shoulder, naturally breaking it, but it's better than instant death from a blow to the head... The scavenger looked angry that he couldn't kill you with one blow.