Replaces some high value symbols with the highest value symbol.
Selects a random symbol for scatter pay evaluation.
Moves a Nitro Reel to create or extend a win.
Places a random number of Nitro Reels on the main symbol grid.
Fills all Nitro Reels straight below the Nitro Wild feature trigger with wild symbols.
Matches all Nitro Reels straight below the Nitro Match feature trigger with a symbol on the same reel as the Nitro Reel or an adjacent reel to try and create a win.
Increases the size indicator on all Nitro Reels straight below the Nitro Upgrade feature trigger.
Expands the main symbol grid up to the maximum 8 rows.
Awards a respin at the end of the game round in which Nitro Reels, Nitro Multiplier, bonus and wild symbols are kept sticky.
Evaluates wins from both the leftmost and rightmost reel.
A symbol type can be chosen randomly during any spin. If the symbols of the chosen symbol type are part of a win, they are locked-in and kept during a respin that also expands the main reels. The cycle continues as long as new symbols of the selected type contribute to the winning combination. Thereafter the locked-in symbols pay out.
3 Boss Battle coins trigger a face off against Nitro Wolf for the chance to win insane returns.
Nitro Reels cover two symbol positions and contain 4, 6, 8, 10 or 12 1×1 payout symbols. Big Nitro Reels cover six symbol positions and contain 2, 3, 4, 5 or 6 2×2 payout symbols.
A Nitro Multiplier covers two symbol positions and multiplies all wins in view.
The wild symbol substitutes for any symbol except the bonus and the super bonus symbols. A payline of all wilds pays as the highest value symbol.
All symbols which are part of a win explode and leave space for additional symbol drops, and an additional row of symbols is added at the top up to a maximum of 8 rows. Nitro Reels and Nitro Multipliers that are part of a win respin. The avalanche feature continues as long as new winning combinations appear.
Super symbols of size 2×2 and Mega symbols of size 3×3 may appear in any spin or symbol drop.
Three or more bonus symbols trigger a bonus game with free spins. During the free spins, all reels of Nitro Reels become sticky. Free spins can be re-triggered.
A combination of bonus symbols and the super bonus symbol triggers the super bonus game, with the maximum number of rows and both paths activated, and the NPD Holding Cell triggers each free spin.
In the bonus game, the safety level advances one row for every new free spin initiated that results in a win. Every new free spin starts at the current active safety level.