Twisted Lab — slot review and demo

Mr Melker's laboratory and the RotoGrid mechanic

At the heart of Twisted Lab is a special RotoGrid symbol that rotates the entire grid 90 degrees from one to four times in a row. The slot first calculates wins across 19 paylines on the standard grid, then triggers the rotation. Each turn recalculates combinations from scratch—so one spin can deliver several waves of payouts.

Slime flasks and coloured multipliers

Three types of flasks appear on the reels: purple with no multiplier, blue with additive values from ×2 to ×100, and pink with multiplying values from ×2 to ×10. When the grid rotates, flasks shatter, slime flows downward and covers positions with wilds. If blue slime mixes with pink, it becomes green—its multiplier adds both values together and starts working as a multiplier.

Two bonus rounds

Three FS scatters trigger the Unleash the Ooze mode with 10 free spins: RotoGrid symbols, flasks and extra scatters land more often. The second bonus—The Twist of the Twisted—removes regular symbols and leaves only blue and pink spinners, each with four values (up to ×1000). The spinners rotate along with the grid, and the Collector symbol gathers their current multipliers. The bonus runs on three lives: each life is one spin, the counter resets when new spinners land. At the end, all collected and remaining multipliers add up and multiply the bet.

96.33% RTP and high volatility

Maximum win is 15,000× the bet, RTP is 96.33%, volatility is high. The demo version of Twisted Lab can be launched on this page—free, no registration, with virtual credits. This is convenient for players from Latvia who want to understand the rotation and cascade mechanics before playing for real money. Compare casino terms with other Hacksaw Gaming slots in the catalogue, and choose a platform in the online casino rating.