ELK Studios returns with the sequel to the popular slot machine Nitropolis. The Nitropolis 4 online slot provides players with thrilling gameplay, excellent audio and visuals, and a variety of bonuses, including Multipliers, Nitro Boosters, Nitro Reels, Avalanches, Mega Symbols, and 2 bonus games. The maximum payout on the Nitropolis 4 slot machine is 50,000 times the initial wager.