Light Crusader is an action-adventure game developed by Treasure and published by Sega for their Sega Genesis console in 1995. It is similar in gameplay to Landstalker: The Treasures of King Nole, blending role-playing video game, action-adventure and platform video game elements in much the same way.

The game is played from an isometric viewpoint. Players can move freely, jump, and push objects. They can execute simple sword slashes, use four magic elements in different combinations, and use items for various effects. Gameplay is a mix of action, puzzle solving, and platforming for the most part, with the usual role-playing staples like towns, shops, equipment, and spellcasting. The player controls Sir David as he travels through an assortment of dungeons, battling creatures such as "slime", solving puzzles to advance and saving those who were kidnapped. An auto-map feature keeps the focus on action and single-room puzzles, rather than mazes or labyrinths.