Lost Castle is an action RPG that combines roguelike elements with engaging gameplay. Set in the corrupted Castle Harwood, players embark on a quest to reclaim treasures while battling against a dark army. The game features both local and online multiplayer modes, allowing up to four players to join forces or compete against each other. Players can face daily challenges and navigate through randomly generated dungeons filled with various enemies and bosses.

The game distinguishes itself with its charming hand-drawn art style and a plethora of items and weapons. With over 100 items and 190 weapons, players can customize their heroes with unique abilities and special attacks. The humor infused in characters and environments adds to the overall experience, making each playthrough exciting and unpredictable. The option to sacrifice fallen heroes for new abilities introduces an innovative mechanic that enhances gameplay depth.