Nitropolis

Nitropolis is a six-reel, four-row slot from ELK Studios set in a post-apocalyptic city ruled by rival animal clans. The game uses a ways system that can expand to 85,155,840 ways to win, depending on the active reel configuration. Its medium-high volatility and 96.1% RTP are listed alongside a bet range from 0.20 to 100.

The main feature is Nitro Reels, which cover two symbol positions and can hold between four and 12 matching symbols. These reels may upgrade to create more ways to win, and they can also trigger winning respins or a second-chance respin after a non-winning spin. The symbols include Wild, Bonus, the four clan emblems, and graffiti-style card letters.

Three or more Bonus symbols start the free spins bonus game, which can award up to 25 spins and retrigger with additional scatter-paying symbols. During the bonus round, Nitro Reels lock as sticky reels for the remaining spins. This demo version is available to play for free and gives players a chance to practice before playing for real money.