<p>777 Streak opens with its Free Spins feature, where any winning mix of 7, 77, and 777 symbols upgrades into the strongest version on the reels, giving the bonus round a sharper edge than the base game. From there, Penguin King keeps the format simple across a 5x3 layout with 10 paylines, using Wilds for substitutions and payouts, while the 777 Lines mechanic pays on mixed 7 combinations to keep spins active. It is a compact classic-style release with low-volatility pacing and a capped top prize of 1,179x.</p>