Shark Attack

You are a deep sea diver in search of a fabulous treasure of diamonds that spilled from the hold of a Spanish galeon that sank during a fierce storm in the early sixteenth century. You dive deep into the murky darkness of Dave Jones' Locker, and enter the shark-infested maze of kelp to retrieve the treasure. You know your mission is rife with danger...the menace of the man-eating sharks that patrol the kelp beds...the lurking menace of the legendary Loch Ness monster, a beast that will pursue you relentlessly if you dare invade its territory.

--From the Atari 2600 Shark Attack instruction manual.