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Sub Fury is an action game released in 1999 for the MS-DOS platform. It was developed by PLBM Games and presents its gameplay from a side-view perspective. The player assumes the role of a submarine commander navigating underwater environments.

The primary objective is to destroy a required number of enemy submarines to complete each level. Players directly control their submarine, maneuvering it to target and fire upon hostile vessels. Progression is structured through distinct levels, with advancement contingent upon meeting specific destruction quotas. A core gameplay system involves managing the submarine's air supply, requiring periodic ascents to the surface for replenishment. Certain stages feature larger boss submarines that can withstand multiple hits and must be defeated to proceed.