Sword of Moonlight (so named after the recurrent most powerful weapon in King’s Field series and some other games by FromSoftware) is primarily an editing tool that allows players to create and customize 3D first-person dungeon-crawling role-playing games in the vein of King’s Field games. Players can create their own maps by selecting any of the 1024 available prefabricated tiles, rotating them, and placing them in various combinations. It is also possible to place objects and enemies in the ensuing dungeon map, as well as customize any parameters such as the player character’s and enemies’ attributes, efficiency of weapons and healing potions, music tracks playing at particular locations, etc.
As a pre-made scenario, the game includes a remake of the first King’s Field done with the editor. The remake features higher-resolution graphics and several changes, such as much less menacing default enemies and a few different object or enemy placements. Otherwise, it stays faithful to the original version, up to the point of having deliberately slow movement of the main character without an option to run.