Nitropolis 4

Nitropolis 4 is a six-reel slot from ELK Studios with an industrial, comic-book setting and a variable ways format. The grid can expand during play, with Nitro Reels, large symbols and a Nitro Multiplier forming part of the main mechanics. The game is listed with medium-high volatility and a 94.00% RTP.

The feature set includes Nitro Booster, which can trigger Max Rows, Garbage Collect, Nitro Reel, Nitro Wild, Nitro Upgrade, Nitro Match, Redrop and Both Ways. Landing three or more bonus symbols activates a bonus game with sticky Nitro Reels, while a bonus and super-bonus symbol combination opens the Super Bonus Game with Max Rows and Both Ways enabled. Nitro Multipliers can stack and multiply wins on screen.

This page is available as a demo version, so players can play for free and practice before playing for real money. The slot also advertises a maximum win of 50,000x the bet, with an X-iter mode offering different entry points into bonus play.