There are only only a handful of hidden movement boardgames. Ninja: Legend of the Scorpion Clan (Ninja) is the best hidden movement game. The designer, Frederic Moyersoen, is best known for Saboteur. The backstory is that a ninja is working with a traitor accomplice to accomplish secret missions.
The game plays as follows. The board is an area-to-area movement grid; most areas are adjacent to five or six others, so there is plenty room for maneuver. There are three roles: ninja, traitor, and guards. In a four player game, the guards are split into to two groups. Each player get a paper mini-map that is kept secret. The guard player(s) use the mini-map to mark locations of the hidden mission goals, traps, and sentries, while the traitor and the ninja use their mini-map to plot movement. The ninja and the traitor pawns are only revealed when they are sighted, and disappear next turn.