Dirty Dawgs of Nitropolis

Elk Studios placed Dirty Dawgs of Nitropolis third in its Battle of Nitropolis series. Gritty Kitty of Nitropolis opened the line, and the far more experimental Rogue Rats of Nitropolis — a version with no reels or paylines at all — followed it; Dirty Dawgs returns to a conventional reel format after that detour. The setting is an urban dystopia, complete with a "Back to Work" sign bolted to the wall, playing out across a 6-reel, 6-row grid.

Only 20 fixed paylines cross that grid, with bets running from 0.20 to 100 and a single RTP of 94% whether spinning normally or paying into a feature through the X-iter menu. Volatility is rated high. Card royals from 10 to A pay 1x to 3.5x the bet for six matching symbols, while a premium group — a dog food bowl, a beer stein, a pistol, a collar and a badge — pays 5x to 25x for the same line length. Wild symbols substitute for everything except the scatter and the Nitro Feature Box, matching the value of the highest symbol in any line they complete.

Nitro Wild Reels land covering two to four vertical positions with a stack of wild symbols behind them. They can be randomly upgraded to a bigger stack or expand outward until a single reel is fully covered, and only one is allowed to land per reel at a time.

Landing a Nitro Feature Box triggers a random modifier, sometimes more than one within the same spin: a Respin that locks any Nitro Wild Reels, Feature Boxes and scatters already on screen; a straight conversion of the box itself into a wild; an expansion of an existing Nitro Wild Reel; or a Nitro Raffle that turns every Nitro Wild Reel in view into a set of 1x1 spinning reels landing blanks or coin prizes, including a possible top-win coin. A separate Dirty Wilds feature can also fire at random in the base game, placing several fully expanded Nitro Wild Reels onto the grid at once without any lead-in.

Three scatters open the free spins round outright; four add one sticky Nitro Wild Reel; five add two; and six trigger a super version carrying three sticky reels. None of the Nitro Wild Reels present in the base game carry across, though landing six of them during the bonus itself adds five more spins, and the round can only retrigger once.

The X-iter menu offers direct buys: a 3x-bet Bonus Hunt that triples the chance of triggering the bonus naturally, three guaranteed Nitro Wild Reels on the next spin for 25x, a single guaranteed Dirty Wilds trigger priced at 100x, the free spins round outright also for 100x, or the three-reel super bonus version for 500x. The maximum win is 25,000x the stake.