Nitropolis 3 is a six-reel, four-row slot from ELK Studios built around a 4096-ways format, with wins paid both ways. The demo version lets players play for free and practice before playing for real money, while exploring the game’s core features, including expanding rows, Big Symbols and Nitro Reels.
The slot uses an Avalanche-style mechanic, where winning symbols disappear and new ones drop into place. Nitro Reels can hold multiple payout symbols, and Redrop keeps bonus symbols and Nitro feature symbols on the grid while the reels respin. A Toxic Wild is also listed, substituting for standard symbols but not for feature symbols.
Three or more bonus symbols trigger the Free Spins bonus game, with Nitro Reels remaining sticky during the round. A combination of bonus and super bonus symbols opens the Super Bonus Game, which runs on eight rows with Both Ways active. The game is shown with medium-high volatility and an advertised RTP of 95%.