Collection Meter In the Pirots 4 slot: how does the bonus chest work?

Above the playing field in Pirots 4, there's a gauge — the Collection Meter. As our birds run around collecting elements, crystals, or bonuses, this gauge gradually fills. As the birds collect the right elements, the meter increases.

When the indicator fills, it adds one "deferred" feature to the queue — up to three can be accumulated. Once the birds have no more room to move, the deferred symbols are activated: they appear on the grid as chests and then transform into a random bonus. For example, a Wild, a coin, a bonus, etc. Important: the scale is reset with each spin.

When you trigger a collection chain, you can see the gauge slowly filling up. This moment of anticipation adds tension to the game and makes it even more engaging. Previous versions of Pirots also featured this element: for example, here's what it looks like in Pirots 2:

Conclusions

The Collection Meter is a way to unlock additional features and add dynamics to the game. It encourages active collection of elements and turns every spin into a mini-quest: fill the meter to earn a chance at a bonus and a bigger payout.