100% Swiss 
Devil's Number - Online Slot Machine
Devil's Number's design is comic book style and is nicely done. The setting is a creepy old library. Joining the lower value A to 10 royal values are scrolls, a book of spells and a cauldron. Top of the payers is the bottle of potion with the skull stopper which delivers 3, 6 or 12 times your stake if you land 3, 4 or 5 on 1 of the game’s 20 paylines. There are 2 special extras that can boost your base game wins:
Upgrade feature - this can trigger on any spin made up of 1 of the higher value scroll, book, cauldron or potion bottle symbols. The payout receives a boost. For example, the potion bottle pays 6, 12 or 22.2 times your stake rather than 3, 6 or 12 times your stake.
Remove feature - land a win made up of 1 of the lower value A to 10 symbols for the chance to trigger this extra. The winning symbols are removed and a cascade follows, giving you another chance to land a winning combination.
Devil’s Number also comes with a Free Spins feature – this is triggered by landing 3 of the 9 symbol on the middle 3 reels on the same spin. You’ll then receive 12 free spins.
Enjoy this spooky slot that can make you win 2'500 times your stake on every spin or free spins with the upgraded payouts.
