Leif's Adventure: Netherworld Hero is a cooperative 2D action-adventure game available on Xbox Series X|S, emphasizing the theme of friendship through its narrative. Players can choose to play solo or join forces with a friend, switching between the main character, Leif, and his sidekick, Ghost, each equipped with distinct abilities. The game invites players to defend Hammerfall against a mysterious evil by navigating through traps, solving puzzles, and upgrading gear as they embark on a journey filled with diverse challenges.

The game features six unique realms rich in side-quests, hidden treasures, and a variety of colorful characters. Combat involves battling numerous creatures and secret bosses using a wide array of weapons that possess elemental abilities. Players can enhance their skills and abilities, including Leif's combat maneuvers and Ghost's supernatural talents, to explore deeper into the game world. The hand-drawn graphics inspired by Nordic folklore contribute to the immersive experience of this adventure.