Twisted Lab Demo: Free Play and Review

A charge of one to four quarter turns

A RotoGrid symbol is a yellow octagon with two arrows and a number from 1 to 4. It never lands on reel 1 in the base game or in Unleash the Ooze!, and FS symbols keep off that reel too. Our log shows each quarter turn as its own step with its own wins, so a two-turn symbol gives the 19 lines three looks at the same symbols: before the turn, after the first and after the second.

The cleanest example came on spin 151. Two blue beakers broke on the first turn, their 5x and 2x combined into 7x Ooze, and that turn paid €8.60. The second found more lines through the same Ooze for €9.80. At the other extreme sits spin 8, whose RotoGrid carried four charges: the grid went all the way round to where it started, and nothing paid.

Out of 498 base spins, 34 had a RotoGrid: 28 with one charge, 5 with two and one with four. No three appeared. 15 of those turning spins paid nothing at all, and together the 34 returned €89.60.

Beakers are wild before they ever break

According to GAME INFO the beakers are wild symbols that substitute for everything on the paytable, and a line of five beakers is worth 10x. They come in three colours. Purple carries no value, blue shows an adding value from 2x to 100x, and pink a multiplying one from x2 to x10.

GAME INFO does not say so, but our log shows that a beaker which stays whole still puts its value on any line it completes. That happened on 40 base spins, and those lines paid €151.80, close to half of all base-game returns, €339.20. Two blue beakers, 20x and 2x, stood on both winning lines of spin 313, and each line was paid at 22x, the two values added. A pink value multiplies instead.

Breaking needs a turn of the grid. Beakers appeared on 191 base spins and broke on only 11 of them. Once a beaker breaks, its Ooze runs to the bottom of the grid, making every square it covers wild. Ooze landing on Ooze adds the two values for the whole reel. Blue and pink together become green Ooze, whose added total multiplies, while purple mixed with blue or pink takes on the coloured value across the joined area. The 11 spilling spins returned €81.40. Top among them was spin 381, where a pink x5 turned a 2x line of five into 10x, 11.1x for the spin.

Unleash the Ooze! for ten spins, The Twist of the Twisted! for three lives

Unleash the Ooze! needs three FS symbols in a single base-game spin and gives 10 free spins with more RotoGrids, more FS and more beakers, and no purple ones. Four FS start The Twist of the Twisted!, which GAME INFO prints and Hacksaw's game page leaves out. That second bonus is a different game on the same grid. Only Blue Twisters, Pink Twisters, Collectors, RotoGrids and four non-paying symbols land, and RotoGrids may now use reel 1.

Each Twister shows four values and counts the one on top. Blue Twisters run from 1x to 1000x and turn with the grid; Pink ones add x2 to x10 to that list and turn on every spin as well as with the grid. A Collector gathers every Twister value at the end of its spin. The round has 3 lives, one per spin, refilled whenever a Twister or Collector lands, and when they run out the values left on the grid are combined top to bottom, reel by reel from the left, into a single figure that is paid in bets.

That 15x Ooze missed every line of the round we bought. A 10x Ooze on free spin 6 did better, paying €20.00, and unbroken beakers supplied most of the rest. The round ended on €43.60, which is 21.8x the bet, for a €200.00 purchase.

A 500-spin session with 11 spills, closing at 43%

A win came on 32% of the 500 paid spins, usually a small one. Half of those wins stayed at or below 0.4x, and one run of 23 spins returned nothing.

Two bonuses landed, both Unleash the Ooze!, opened by three FS and 10 spins long. The first, from spin 156, made 16x, mostly from a 10x Ooze on its second free spin. The one from spin 336 reached 29.5x, the session's best result. Its biggest free spin, €30.00, owed nothing to Ooze: an unbroken 15x beaker sat on a 1x line.

The demo balance never rose above its first spin. It closed at €4,430.20 on the last of the 500 spins, its lowest point, after €1,000.00 staked and €430.20 returned. A sample this size is far too small to judge an RTP by. What the log does record is one run in which no spill was worth more than 10x.

3x, 50x, 75x: three FeatureSpins rungs before the bonuses

Five cards fill the menu, every one labelled Very high volatility. The three FeatureSpins charge per spin and climb in steps. For 3x a spin, BonusHunt FeatureSpins sends the chance of a bonus up fivefold. RotoGrid FeatureSpins costs 50x and guarantees a RotoGrid and at least one blue beaker on every spin, and since the grid then always turns, that beaker always breaks. The top rung, Oozing RotoGrid FeatureSpins at 75x, raises the guarantee to two blue beakers, and neither mode lets purple ones land. Compare our base log, where a spill came 11 times in 498 spins.

Buying Unleash the Ooze! costs 100x once and The Twist of the Twisted! 200x, the only route to the Twisters short of four FS. Inside the game, GAME INFO gives 96.30%, the version this demo plays. Hacksaw's own page prints no RTP list, while listings at casinos add 94.20%, 92.18% and 88.23% as lower options for operators. Buys are not offered in every jurisdiction.

Strength of Hercules and Chaos Crew 2 each share one piece

The RotoGrid mechanic returned in Strength of Hercules, a March 2025 release that pays on 3,125 ways instead of lines. Several RotoGrids can fire there in one spin, each becomes a Wild after turning the grid, and no beakers wait to break.

With the same 5x5 grid and 19 paylines, Chaos Crew 2 runs its Bonus on 3 lives, refilled whenever a multiplier symbol lands. The Twist of the Twisted! borrows that rhythm, with Twisters and Collectors in place of the cat and skull multipliers.

On its lines Twisted Lab's beakers do double duty, as multiplying wilds where they stand and as Ooze once the grid turns. In our 500 spins the standing beakers earned more than the Ooze did. A RotoGrid came about once in 15 spins, and the session finished at 43%.