Nitropolis 2 by ELK Studios is a six-reel, four-row slot with a ways-to-win layout that can change with special features. The game uses Nitro Reels, which cover two symbol positions and may contain 4, 6, 8, 10 or 12 payout symbols. The RTP is stated at 95% and volatility is medium-high.
The feature set includes Wild symbols, winning respins, and both-ways payouts through the Nitro Booster. Green Nitro Boosters affect the Nitro Reels in the same column, while gold Boosters apply to all Nitro Reels. The booster can add effects such as respins, wilds, bonus symbols, upgraded Nitro Reels, and both-ways play.
Three or more bonus symbols trigger the bonus game, where Nitro Reels lock in place for the remaining free spins and the round can be retriggered. A demo version is available on this page, allowing players to play for free and practice before playing for real money.