Twisted Lab

Twisted Lab is a mad-scientist slot from Hacksaw Gaming featuring Mr. Melker and his assistant, Pat the Rat. The experiment takes place on a 5-reel, 5-row grid, where wins are formed across 19 winning lines.

The game is rated 4 out of 5 for volatility and has a stated maximum win of 15,000x the bet. According to the provider information, that maximum is available across all game modes.

Its central mechanic is RotoGrid™, a special symbol that rotates the entire grid. Those rotations also interact with Oozing Beakers, allowing wild positions and multiplier effects to develop as the layout changes.

Twisted Lab uses payline wins rather than a cluster system. There are 19 winning lines running through the 5x5 layout, and the game evaluates wins from the initial drop before activating any landed RotoGrid™ symbol.

That order matters because the original result is collected first. The subsequent grid movement can then rearrange the symbols and create further opportunities on the same set of winning lines.

A RotoGrid™ symbol can arrive with between one and four charges. Every charge turns the complete grid 90 degrees clockwise, changing the position and orientation of everything on the board.

The mechanic is more than a visual rotation. It can reposition regular symbols for additional payline wins and break any Oozing Beakers present on the grid. Outside The Twist of the Twisted bonus, RotoGrid™ symbols cannot land on reel 1.

Oozing Beakers activate when a RotoGrid™ rotation breaks them. Their contents spill toward the bottom of the newly rotated grid, and every covered position becomes wild. These ooze wilds substitute for all symbols listed in the paytable.

Purple Oozing Beakers create ooze without multiplier values. Blue Oozing Beakers carry adding values of 2x, 3x, 4x, 5x, 10x, 15x, 20x, 25x, 50x or 100x. Pink Oozing Beakers use multiplying values of x2, x3, x4, x5 or x10.

When new ooze covers an existing ooze position, the multiplier values are added together. The resulting value applies to all oozing positions on that reel. If Blue and Pink Ooze combine, their values are added and the resulting Green Ooze multiplier becomes multiplying.

Landing three FS scatter symbols at the same time in the base game activates Unleash the Ooze with 10 free spins.

During these spins, RotoGrid™ symbols, FS symbols and Oozing Beakers have an increased chance of appearing. This gives the rotating-grid and spilling-ooze mechanics a larger role throughout the feature.

Purple Oozing Beakers are excluded from Unleash the Ooze. The beakers that appear can therefore introduce the Blue adding multipliers or Pink multiplying values alongside the wild positions created by each spill.

The Twist of the Twisted changes the available symbol set. Only Blue Twisters, Pink Twisters, Collector symbols, RotoGrid™ symbols and non-paying symbols appear during this bonus.

Every Twister displays four multiplier values, with the value at the top acting as its current value. Rotating the symbol moves a different value to the top. Blue Twisters rotate with the grid when a RotoGrid™ symbol lands, while Pink Twisters rotate on every new free spin and rotate once more if RotoGrid™ also activates.

Blue Twister values can be 1x, 2x, 3x, 4x, 5x, 10x, 15x, 20x, 25x, 50x, 100x or 1000x. Pink Twisters can show those values as well as multiplying values of x2, x3, x4, x5 or x10.

Twisters remain in place until a Collector symbol gathers their current values or the feature ends. A Collector activates at the end of the current free spin and collects the multiplier values of every Twister on the grid.

The Twist of the Twisted starts with three refilling lives, with each life representing one free spin. Landing a Twister or Collector symbol resets the lives. The feature finishes once all three are used without another qualifying symbol landing.

At the end, the current values of any Twisters still on the grid are added to the amount stored by Collector symbols. That combined total is then multiplied by the bet to determine the feature win.

RotoGrid™ symbols can land on every reel during this bonus. That differs from the other game modes, where RotoGrid™ and FS symbols are unable to appear on reel 1.

The Twisted Lab demo is useful for following the order of each RotoGrid™ event. First check the initial payline result, then watch how many rotation charges are attached to the special symbol and how the new layout affects the 19 winning lines.

Oozing Beakers are another point to follow closely. Their final position depends on the grid rotation, while overlapping spills can change the multiplier applied to the oozing positions on a reel.

In The Twist of the Twisted, pay attention to the top value on each Twister before and after a rotation. The difference between Blue and Pink rotation rules can change which multiplier is active when a Collector appears.

Twisted Lab builds its feature set around one connected idea: rotate the 5x5 grid, break the beakers and let the changing positions affect paylines, wilds and multipliers. The base mechanics and Unleash the Ooze remain focused on payline wins, while The Twist of the Twisted switches to persistent Twisters, collecting symbols and refilling lives.

The main specifications to note are the 19 winning lines, 4 out of 5 volatility rating and 15,000x maximum win. The practical complexity comes from tracking rotation charges, ooze combinations and the current value displayed at the top of each Twister.