This is the boxed set of The World of Necroscope roleplaying game adapted from Brian Lumley's popular horror novel series and designed for West End Games' MasterBook system.
The boxed set includes the Necroscope WorldBook, as well as a MasterBook rule book, two ten-sided dice, and the MasterDeck, a card deck used for use with the MasterBook system.
This boxed set seems to be somewhat rare.
From the back of the box:
The World of Necroscope is a roleplaying game set in the dark world of Brian Lumley's imagination. A world where paranormal spies, ESPionage agents, and Mind Spies fight a secret war against darker things and one another. The Wamphyri, or vampires, exist, and their age-old evil stretches from the beginning of time to threaten the Earth.
But you are undaunted. You are not a mere human. You are talented. You are an ESPer, with powers undreamed of by your peers. You may be a telepath, a seer able to see into the future, a Shaman able to kill with a glance or perhaps able to talk to the teeming masses of the dead as a powerful Necroscope!