Buffalo Ice: Hold The Spin Slot by Gamzix

Jackpots in the bonus round are tied to row completion, not random triggers. Fill one full horizontal line of coin symbols across the 5-reel grid and the Mini pays out. Two complete lines award Major. All three rows filled - that's the Mega at 5,000x, and it's the only path to the top prize. The Hold The Spin bonus fires when five or more coins land in a single spin, locking those positions and starting 3 respins. Each new coin resets the counter. So the round lives or dies on density - you need enough consecutive coin landings to physically wall off entire rows before the respins expire.

Stacked Wilds are the other half of the base game. The buffalo symbol covers an entire reel when it appears, substituting for everything except scatters and coins. Two full-reel wilds adjacent to each other across 20 paylines generate a lot of overlapping wins quickly. Free spins trigger from three or more scatters (8, 10, or 12 spins depending on count), and the symbol set changes during the round - different paytable, different odds. Buying in skips the scatter requirement entirely, dropping you straight into free spins at whatever bet you've selected. The bonus game also triggers inside free spins, so the jackpot ladder is still live during bought rounds.

Frozen peaks and pink-orange twilight behind the grid, with ice pillars flanking both sides. The wildlife symbols - a brown bear, grey wolf, lynx, and eagle - are painted in a detailed naturalistic style, warmer than the frozen surroundings. Card royals (J through A) get icicle-drip textures in bright greens, oranges, and reds. Buffalo Coin from the same provider runs the same engine in a non-winter skin, and Buffalo King Megaways takes the animal lineup into a completely different math model with ways pays instead of fixed lines.