Hammerin' Harry, also known as Daiku no Gen-san in Japan, is a classic platform game from the 1990s era. Developed by Irem, the game features a unique protagonist - a hammer-wielding carpenter named Harry. Set in the peaceful town of Carpentersville, the game sees Harry take on The Rusty Nailers, a group of workers from a corrupt construction company set on bulldozing his home. With a choice of smashing enemies directly or sending shockwaves, players navigate through construction sites, sewers, ships, and a mansion, culminating in a showdown with the leader who ordered the demolition. Bonus stages and boss battles add extra layers of excitement and challenge.