Tinkerbot Slot by ELK Studios

Cluster Pays with a Botbox Engine

Tinkerbot breaks from ELK Studios' usual payline and ways-to-win formats. This is a cluster-pay game on a 5x5 grid that expands to 7x7. Five or more connected identical symbols form a winning cluster, and only the largest connected group pays. The 30% hit frequency makes it one of ELK's most active base games - clusters form often enough that the botbox system stays fed.

Botboxes: Feature Factories

Each winning cluster generates a botbox in one of the cleared positions. When three or more botboxes appear simultaneously on the grid, they open one at a time and each releases a random feature: Wild, Hot Wild (converts random symbols to Wilds), Multiplier (adds to the global multiplier then becomes Wild), Expand Grid (+1 column and +1 row), or Multisymbol.

The Multisymbol is the unusual one. It's a stack of identical symbols on a single position that counts as a cluster by itself. When part of a winning cluster, it explodes all non-winning payout symbols in proximity. Clear enough of the grid and you hit Botfrenzy - removing ALL payout symbols awards random extra botboxes on top of cluster-generated ones.

Absorb, Transform, and the Global Multiplier

Button symbols trigger either Absorb (collects all copies of an adjacent symbol into one Multisymbol stack) or Transform (upgrades all copies of an adjacent symbol to a higher-value type). Both reshape the board before the next evaluation pass. The global multiplier sits on a TV-screen display and applies to every cluster payout. Multiplier botbox symbols feed it, and it never resets during a game round.

Bonus and Super Bonus

Three bonus symbols trigger 7 free drops with persistent botboxes, multiplier, and grid size between drops. Four bonus symbols trigger the Super Bonus: 9 free drops starting at maximum 7x7 grid with a boosted multiplier. That 7x7 grid means 49 positions for cluster formation versus 25 in the base - nearly double the surface area. X-iter ranges from 1x to 500x (Super Bonus guaranteed). RTP is 94.0%, ELK's current standard.