Top Trumps was and still is I guess a very popular card game, essentially all they are is a set of cards of a certain subject [usually cars, planes, boats, ships, bikes etc] which has a picture of whatever car, plane etc, the name of the subject and a list of categories such as MPH [miles per hour], HP [horse power], etc for cars, then it gives those sums for that category. You deal the cards out among the players who keep just the top card facing up and the first player picks a category and says it out loud to the next player, who ever has the highest wins the other person's card and you just carry on until one person wins all the cards. Simple but addictive, plus you learn something that may or may not impress someone. Whenever we played Top trumps it was always the way you asked if you wanted to play 'Do you wanna game of Top Farts?' or a game of Top [followed by a raspberry noise].
The Horror Top Trumps were 2 sets [Dracula and Devil Priest], obviously the same format as other Top trumps but this time we had cool monsters such as The Fiend, The Beast, Thor, Creature from the Black lagoon, Lizard Man, Death, The Ghoul, Man eating Plant, Phantom of the Opera, Frankenstein, Headhunter, Circus of Death, The Risen dead, Maggot, Wolfman etc. Some of the monsters were made up, but others were familiar horror characters or monsters from horror films. Some of the images taken from horror films were sometimes called something else on the cards such as The Reptile from the Hammer film was called here The Freak, or there is an image of Lon Chaney snr as the Vampire from London after midnight, here he his called The Mad Magician, not that it really matters. The categories for the Horror top trumps are Physical strength, fear factor, Killing Power, and Horror Rating.
Above we see the 2 covers of both sets, examples from both sets and the back of a card.