Atari has ported another classic DIV game to Dreamcast Fenix, heres a description:

A classic style game in the vein of Sega/Gremlin’s 1977 arcade game Depth Charge, the goal of the game is to destroy the subs that appear below your ship by dropping depth charges. The points you receive depend on how deep the sub is when you hit it. Go after the red subs for huge points. Beat level 15 to win the game.

Download from the Subhunt Page