Nova 7s Slot by RealTime Gaming

The Red 7 is the whole engine. When it drops anywhere on reels 1 through 5, it doesn't just sit as a single wild - it ignites into a Solar Flare animation and expands vertically until the entire reel is wild. Two Red 7s on the same spin means two full reels of wild. On a 25-line grid that turns a dry spin into several stacked combos across the remaining three reels, and the Solar Flare effect is loud enough that you register the hit before the paytable math finishes crediting. Every other symbol on the grid substitutes through the expanded wild except the Blue 7 scatter.

Three or more Blue 7 scatters trigger the Nova 7s free games round, and this is where the expanding wild logic becomes the reason to play. During free games, Red 7 appearances climb noticeably - the feature is tuned for more frequent reel-wide flares rather than a multiplier boost. Retriggers are possible when additional Blue 7s land inside the bonus, stacking more spins on top of whatever remains. The end-of-feature reveal plays a short animation summing up the total win before the game drops back to base play.

Visually the game sits deep in late-2010s RTG cosmic territory. A rocky lunar ridge runs along the bottom edge of the screen, the reels float against a starfield with distant planets hanging in the background, and a full blue Earth-like globe sits in the top-right corner. Symbols are atomic orbit icons in electric green, purple, yellow, orange, blue and red - six colour variants of the same spinning-nucleus design - plus several rendered planet symbols in matching cosmic palettes. The Red 7 premium glows with a heavy orange-red outline. The Blue 7 scatter matches the same font in electric blue. Side panels read "25 LINE PLAY" and "HELP & RULES" vertically in tube-neon lettering.

No buy bonus, no ante bet, no gamble game. The bet range sits at 25 cents to 12.50 across the fixed 25 lines, and the 50,000x ceiling is gated almost entirely behind how many expanding Red 7s the free games round can chain together. Base play runs flatter between flares than RTG's Chinese-themed catalogue, but when the cosmic wilds start compounding across a bonus the mechanic does the heavy lifting without needing a secondary pick screen or a jackpot meter to prop it up.