Ludorum Games - Ice Flow Playing time 45-75 minutes. Climb past ice ridges using rope, and avoid polar bears by using fish. The first player to get all 3 explorers to Siberia is the winner. Oversee 3 explorers crossing the icy waters of the Bering Strait between Alaska and Siberia -- on foot! An exciting strategic family board game for 2-4 players, aged 11+.