from the back of the module:
Rapture of the Deep (Module GW5)
"A terrible menace from the sea is threatening villages all along the coast. Whole shoreline communities have been disappearing without a trace.
The remaining area inhabitants have banded together and sent for a group of experienced heroes to help. They want to know what could be causing these horrible events, and more importantly, what can be done to put a stop to them. Is it some new terrifying monster from the depths? Or is there something more sinister at work?
The adventurers will travel deep beneath the waves to discover the answer. Can they survive the strange and dangerous ocean depths of Gamma World? Can they solve the mystery before it's too late?
This module contains gamemaster notes, background information, maps, rules for underwater adventuring, new equipment, and over 30 new aquatic creatures for use with the Second Edition Gamma World science fantasy role playing game."
A fan module created by Les Braun, Mars, SixthSixtySix and John "Calel" Steele to fill the gap in the TSR GW sequence, GW5. For intermediate to advanced players.