Released by Microgaming, Monster Mania is a monster-themed 9 coin slot machine with 5 reels and 9 paylines. The monsters are affectionately named Tongue, Gecko, Horns, Eyeball and Snake. The graphics and sound effects are amazing, and the hit rate is quite high with 38 possible winning combinations. Coin sizes range from $0.25 to $5, so the maximum bet is $45. The Monster Wild symbol is wild and appears only on reels 2, 3 and 4 where it replaces all the other 10 regular symbols to create winning combinations. The Scatter Brain is a scatter symbol.

Winnings depend on the symbols displayed on the paylines. Winning combinations pay from left to right and have the symbols next to each other. At least one of the symbols must appear on the 1st reel. The highest combination is 5 Tongue monsters on a payline and pays out 1,000 coins. The second highest combination is 5 Gecko monsters which pay out 900 coins. Scatter wins are calculated by multiplying the Scatter Brain symbols payout by the number of credits bet. Three, four or five Scatter Brain symbols on the reels multiply payouts by 10, 50 or 100 respectively.