Nitropolis is a high-volatility slot by ELK Studios featuring the innovative Nitro Reels? mechanic. These special reels cover two symbol places and can hold up to 12 identical symbols, potentially upgrading for more ways to win. The game includes Winning Respins and a Free Spins bonus game where all Nitro Reels? lock and stay sticky. A Buy Bonus feature allows players to purchase either a standard bonus or a super bonus with a guaranteed retrigger. With its unique reel mechanic and bonus features, Nitropolis offers an exciting and potentially rewarding gaming experience.