I know it's a long shot but ...

Does anyone know what this board game is called?
It had a purpley kind of board with like rivers and stuff on it, and you had to use the raft to get across one side of the board, and had to buy some knives from the knife shop at some point for some reason ... I can't remember much more of it as it is years old but I remember it vaguely so ... can anyone help?