Monster! Bass Fishing has players reeling in an assortment of nine fish while boating across five tranquil lakes. After selecting the appropriate bait and finding a good spot, players can cast the line and patiently wait for a nibble. The object is to catch as many fish as possible within the allotted time, as the fisherman who nets the biggest haul advances to next locale. Catching fish is not necessarily a given, however, as players must learn which bait works best in the varied conditions found on the lakes.