Mega Mine Bonanza

The Activation Field is a unique system where the win determination proceeds in two distinct phases: 'Field Creation' and 'Field Activation'. The player first creates special 'Fields' in various positions on the reels through a specific action (usually a win), and then an additional 'Activator Symbol' must appear to finally receive the rewards from those fields. This is different from a 'Positional Multiplier' where a multiplier is directly accumulated on a spot; instead, it provides a new kind of fun, like 'cultivating a land with potential and waiting for the rain to harvest'.

Symbol Upgrade is a powerful feature that progressively converts low-value symbols on the reels into higher-value ones as the game proceeds. The core of this feature is not just a one-time symbol change, but a 'growth' structure where lower-tier symbols are permanently removed from the reels and replaced by higher-tier ones. This drastically increases the average expected payout of the reels towards the end of the round.