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Developed by Hacksaw Gaming, the Twisted Lab slot machine uses hilarious cartoon graphics with a suitably dark sense of humor. Symbols on the 5x5 grid include false vampire teeth, a tentacle, eyeball, and wired brain. This weird concoction is the work of Mr. Melker, the mad scientist standing to the side of the reels, ably assisted by Pat the Rat, who has an important job here.

Various collector symbols, colorful beakers, and non-paying dead fish, cat skulls, and rotten apples also appear at random times. It’s certainly twisted, definitely fun, and available to play across desktop or mobile devices at the best casinos online.

The bet range is from 0.10 to 100.00, and you win a prize whenever matched symbols land across any of 19 ways. Here’s what they pay as a portion of the total bet –

Play the Twisted Lab slot online and you find a high volatility in the lab, matched with average returns of 96.3%.

It’s an online slot with unusual bonus features. We’ll start with the innovative RotoGrid™ system that sees Pat the Rat turning the reels 90 degrees clockwise, up to four times. The circular arrow RotoGrid™ symbol unlocks this feature. It holds from one to four charges and each rotation can lead to a new win as symbols line up in new patterns.

Oozing Beakers help by leaking their contents as the grid tips them over. Purple beakers send wild symbols oozing down the Twisted Lab online slot grid, and these can substitute for others to help complete wins. Blue beakers leak multipliers of 2x – 100x, while pink beakers add multipliers of 2x – 10x to the blue values.

If Ooze spills onto any already spread across the reels, multiplier values add together for potentially massive prizes. Play Twisted Lab for free on this page and you’ll see how Ooze can pay up to 15,000x the stake on any spin.

Any three FS bonus symbols trigger 10 Unleash the Ooze free spins where there’s a greater chance of RotoGrid™ and Oozing Beakers throughout.

Four FS symbol lead to the Twist of the Twisted bonus round. It’s a respins game where only Blue Twisters, Pink Twisters, Collect symbols, RotoGrid™ symbols, and non-paying symbols can appear for an initial three spins. Blue Twisters hold values from 1x – 1,000x, while Pink Twisters hold the same values, or further 2x – 10x multipliers.

Anything other than non-paying symbols reset the spin counter. Blue Twisters rotate when a RotoGrid™ symbol lands, and Pink Twisters rotate on every respin. Land the Collector symbol and it gathers all multiplier values. Once the round ends, all visible multipliers collect from top to bottom, then left to right across the reels.

There’s equally clever features from games like the Mad Scientist online slot by Betsoft and the Doctor Electro slot from Kalamba Games.

There’s nothing mad about this game. In fact, it’s an ingenious slot, with a fantastic concoction of features. The RotoGrid™ mechanism can lead to several wins in a row, especially as Oozing Beakers spill their valuable contents, while free spins and respins are where the vast 15,000x maximum win gets a little easier to reach.

Play the Twisted Lab slot machine at our favorite Hacksaw Gaming sites and enjoy Mr. Melkers’ inventive gameplay.