Our group played this map the other night. The game ends when all monsters are dead or have left the map (taking party guests with them).
At the close of the game, I (Overlord) had one monster left and the heroes made a run for the search cards. Before they could reach the searches, It was my turn and my one remaining monster made a swift run to the exit (without a guest). Then game ended, as all monsters were gone. I prevented the heroes claiming the remaining searches.
Was this a legal move?
Many thanks in advance.