Energoonz

Released in 2013 by Play’n GO

It is a predecessor for now-legendary Reactoonz slot.

The game features a 5×5 grid, where symbols drop down in the grid to form winning combinations. Wins are achieved by getting 3 or more symbols in a row, horizontally or, vertically.

Also, Energoonz features a wild symbol that substitutes for any other symbol. Last but not least you can also get to the bonus game by clearing all symbols from certain columns to reveal text BONUS underneath.

RTP is 96,69% and variance is Medium.