Yggdrasil has expanded its game portfolio with the launch of its latest slot, 777 Volt GigaBlox.

Symbols can grow up to 6×6 in size in this 6-reel slot through Yggdrasil’s Game Engagement Mechanic (GEM) GigaBlox, while players can also win a maximum of 5,000x their stake via free spins with extra features and lucrative diamond symbols.

“There’s something special about the GigaBlox GEM,” said Yggdrasil head of games production Tomasz Kowalik. “Players quickly fell in love with the mechanic as soon as we introduced it to our games and our portfolio has been boosted by it ever since.

“We are confident that 777 Volt GigaBlox will be another huge hit for Yggdrasil, in part thanks to its epic GigaBlox gameplay and game enhancing free spins features that have so much to offer.”

Landing five or more scatter symbols anywhere on the reels will trigger a free spins bonus, during which players can pick extra features which can seriously boost bonus gameplay.

Those additional possibilities to win include Wild High, which sees high-paying symbols transformed into a wild, 2x win multipliers, expanded reels, extra wilds, additional free spins and High Stacks where one high-paying symbol stacked on the reels.

Before the bonus begins, players can opt to gamble to unlock up to eight extra features by playing a pick-and-click mini-game. Making the wrong choice immediately ends the free spins session.

Diamond symbols can land on the fifth reel at any time awarding an instant cash prize or free spins, even if the precious gem is only partially visible. The bigger the diamond the better the reward.