Wild Depths

Wild Depths is a 5x4, 40-payline underwater slot from Pragmatic Play. 96.48% RTP, high volatility, 5,000x maximum win. The base game features roaming wild symbols that shift positions each spin, substituting for standard symbols and carrying their own multiplier values. Three scatter symbols trigger the free-spin round; four or five scatters award more spins at the outset.

During free spins, roaming wilds become sticky — they hold their position after contributing to a win rather than shifting on the next spin. A progressive multiplier runs through the round, increasing with each winning spin. The combination of sticky positioning (wilds stay where they pay) and an accumulating multiplier means that a free-spin round where multiple wilds land early and remain for subsequent spins compounds the multiplier more aggressively than rounds where wilds land late.

The uncapped retrigger mechanic is the session variable most players underweight. Landing three or more scatters during free spins adds five additional spins with no maximum on retrigger count. A free-spin sequence that retriggers twice and arrives at the final spins with four sticky wilds locked in position and a 12x–15x running multiplier is the structural basis for the 5,000x ceiling.

The 40-payline format is denser than the 243-ways format for near-miss frequency — payline alignment requirements mean misses on close symbol combinations are visible and common. Roaming wilds in the base game keep the pre-bonus game session alive compared to purely tumble-based formats. The 96.48% RTP is mid-tier for the PP 40-payline high-volatility category and the 5,000x ceiling is standard for this format.

Verdict
Sticky wilds and an accumulating multiplier in free spins with an uncapped retrigger. Solid 40-payline high-volatility construction with a 5,000x ceiling that the sticky-wild retrigger path makes structurally realistic.