Troll's Gold

Troll’s Gold by Relaxgaming is a video slot with a five-reel setup arranged in a 3-4-5-4-3 pattern and 20 fixed paylines. The theme blends fantasy and adventure, drawing players into a dragon’s den guarded by trolls and filled with treasure, with cartoon-style graphics and trolls among the symbols. In the base game there are wild symbols that appear on reels two through five, each wild carrying a multiplier of x1, x2 or x3; when more than one wild contributes to a payline win the multipliers multiply together, allowing for combinations of up to x81. One key feature is the Lock-In Re-Spins: when a full stack of matching symbols lands on reel one, those symbols — along with any matching ones or wilds elsewhere — lock in place and trigger respins; the respins continue until no new matching symbols or wilds land. If the entire grid becomes filled with the triggering symbol or wilds during Lock-In Re-Spins, a random total win multiplier of x2, x3, x5 or x10 is awarded. Another major feature is the Treasure Trove Re-Spins, triggered when reel one is entirely filled with gold bag symbols: this feature removes regular symbols and gives you one respin life, during which only gold bag symbols and Treasure Chest Collector symbols (plus blanks) appear. Each gold bag shows a prize multiplier and each treasure chest collects all visible values; all symbols that land stick and contribute to a meter on the side. Filling 12 up to 19 slots on that meter awards increasingly large prize multipliers, with the top award reached when all 19 positions are filled. Non-UK players may use a Bonus Buy option to gain immediate access to the Treasure Trove Re-Spins feature for 60× the bet. The game also supports autoplay.

You can play it for real money.