Devil's Number by Red Tiger Gaming is a five-reel, five-row slot with 30 paylines and high volatility. The game uses a Gothic horror theme with skulls, fire, occult symbols and card values from 10 to A. Its RTP is listed at 95.05%, with bets ranging from 0.2 to 40.
The main special feature shown in the paytable and feature screens is the Upgrade mechanic linked to the Mark of the Beast symbol. When this symbol appears in a winning line, it can burn and upgrade the symbol value within the same spin, with cascading wins indicated in the game description. Payouts are set out for three-, four- and five-symbol combinations.
This page is available as a demo version, so players can play for free and practice before playing for real money. The layout includes standard slot controls such as stake selection, autoplay and turbo spin, alongside a paytable and feature information for checking symbol values and bonus behaviour.