The video slot Tome of Madness from PlayNgo, takes you on a trip into a bizarre world. Tome of Madness can be played on a 5×5 screen and the maximum win can be 2000x the total bet. The winning combinations are created by clusters of 4 or more of the same symbols. So try to make many winning combinations, because then you will fill the Portal meter for winning extra boosters and Wilds. So if you fill the entire meter, your prize will be the Bonus round, the Cthulhu game. The Wild at this slot is the Book and substitutes all other symbols. There is also another Wild, Rich Wilde, he substitutes all symbols and doubles the winning. The highest paying symbol is the purple Amulet. Other high paying symbols are 4 Gems with different colours. You can find the Portal meter at the top, just try to fill up this meter. But if you go to the maximum of 42 symbols, the Other World Free Spin Bonus is triggered. This cool slot is full of action, therefore try Tome of Madness for free or with real money online.