The Legend of Zelda: Spirit Tracks

A puzzle-adventure RPG where Link travels across a kingdom by train, charting routes on the DS touchscreen while dodging hazards and enemies on the tracks. The core mechanic pairs Link with Princess Zelda's ghost, who can possess armored suits called Phantoms. You switch between controlling Link and directing Zelda to solve dungeon puzzles that require both characters—Link might distract a guard while Zelda slips past, or she'll carry him across gaps. Overworld travel involves plotting train courses, managing speed, and firing a cannon at threats. Dungeons feature item-based puzzles in the series' tradition, but the mandatory co-op layer distinguishes the design. Cel-shaded visuals and stylus controls define the presentation. If you're okay with train segments breaking up the exploration, the dual-character puzzles offer something different from standard Zelda structure.