Gold Oasis

Gold Oasis is a 5x3, 243-ways slot from Pragmatic Play. 96.06% RTP, high volatility (5/5), 7,260x maximum win (capped). The Symbol Duel mechanic distinguishes it from standard 243-ways slots: randomly during the base game, one symbol challenges another — the winning symbol replaces up to 10 of the losing symbol's positions on the reels for the remainder of that spin, instantly shifting symbol distribution and win probability.

Free spins trigger on three golden keyhole scatter symbols. During the bonus, the Symbol Duel fires for every two scatters collected — each duel win reshapes the reel set further and awards additional free spins. The key free-spin rule is that all symbols pay as five-of-a-kind for every winning combination, regardless of the actual count on the reels — a three-of-a-kind pays at the five-of-a-kind rate. That rule structurally elevates every win in the bonus round.

The all-pays-as-five-of-a-kind rule during free spins is the mechanic that moves the ceiling. Combined with Symbol Duel redistribution concentrating winning symbols, a free-spin round where a high-value symbol dominates the reels and pays five-of-a-kind rates is the path to the 7,260x cap. Most bonus rounds without favourable duel outcomes pay in the 15-80x range.

The 96.06% RTP is below average for a 5/5 PP high-volatility title. The Symbol Duel mechanic is the most original base-game feature in the 243-ways format from Pragmatic Play — and the all-pays-as-five-of-a-kind free-spin rule is genuinely distinctive. The math is tighter than the innovation suggests; play for the mechanic, with the RTP factored into stake sizing.

Verdict
Symbol Duel redistribution plus all-wins-at-five-of-a-kind free spins — two genuinely original mechanics on a 243-ways grid. RTP is below peers; the design is not.