Panther Pays: PowerPlay Jackpot Slot by Playtech

Panther Pays sets its 5x3, 50-line reels against a jungle waterfall, and the black panther is both the star and the top symbol. It lands stacked, so a full column of glowing-eyed panthers is what you're hoping for, paying 25x your total bet for five across. Below it come a scarlet macaw, a jade amulet, a white-faced monkey and a blue dart frog over the usual royals. Medium volatility and a 96.44% RTP keep it fairly even-tempered.

A brilliant diamond is the wild, and it only turns up on reels two through five, never the first. It covers everything except the green gem scatter. That scatter is the way in: land three or more and you get 10 free games with the Added Wild feature, which is where this one gets interesting. On every free spin an extra wild is dropped onto each of reels two to five, and it keeps stacking them up, as many as ten per reel by the end. Three more scatters mid-round hand you another five spins.

Because the wilds accumulate rather than reset, a long free-games run can leave most of the board wild by the final spins, and that's how the base 250x max win is reached. It's not a huge ceiling, but the added-wild build-up makes getting there feel earned rather than random.

This is the PowerPlay Jackpot version, so three progressives sit down the left, Mega, Peak and Mini, feeding off network play. They read "Unavailable" in the free Playtech demo since progressives only pay for real money, so treat the demo as a way to see how fast those free-game wilds stack rather than to chase the jackpots.