Separate entry from extension
Write down the scatter requirement and awarded spins for initial feature entry, then find the distinct rule for scatters that land during the feature.
A Retrigger Does Not Work the Same in Every Game
Additional free spins may require a different number of scatters than the initial trigger. Some releases add spins, some upgrade a mode, and some do not allow a retrigger at all.
Check reel and position eligibility
Confirm whether scatters can appear on every reel, on the extra reel or only in named positions. Artwork alone does not show eligibility.
Record multiplier treatment
Determine whether an extension preserves, increases or resets the active multiplier. Also check whether added spins use the same stake and feature mode.
Note caps and exclusions
Some titles limit retriggers or exclude them from purchased features. Keep the rule beside the exact game version when comparing candidates.
Common questions
Is the retrigger requirement always the same as entry?
No.
Can a game prohibit retriggers?
Yes.
Do added spins always reset the multiplier?
No; check the release.