The sledgehammer is a two-handed blunt melee weapon that can deal a great amount of damage at the cost of being cumbersome. It is a highly risky weapon to use because of the weight on the person that continuously weighs down on the player and slows them down. The sledgehammer is unable to be used while exhausted.
The sledgehammer has the highest max damage output of all weapons as well as the highest average damage. It is plagued with the longest swing time of all melee weapons, requiring the player to plan his attacks against zombies.
Sledgehammers are usually found in crates and metal shelving. The sledgehammer's durability is exceptionally good and it takes a long time to break a Sledgehammer. (1/40 chance of durability loss)
The sledgehammer also functions as an effective door-breaker and tree chopper. It has the ability to do 40 door damage compared to the Axe's 35. It can also provide manually 10 tree damage.
The sledgehammer is one of the few weapons that can attack 3 zombies at a time, and is a triple attack weapon (compared to the baseball bat which can hit 2). Attacking however with a sledgehammer is extremely tricky due to its swing speed and care should be taken as a extremely tired character cannot swing the sledgehammer.
Destruction of Blocks
The sledgehammer can also be used to destroy walls, doors, windows and other miscellaneous objects, this is done by right clicking and activating the "Destroy" function on the equipped Sledgehammer. Then a red box will appear. Right click on a structure that will be highlighted with red under the cursor, and then destroy. After a short animation the structure will be destroyed.
The sledgehammer like the baseball bat can be used to smash a watermelon.