How to Play Oxygen 3

Open Oxygen 3 and adjust your stake between $0.20 and $100. Mid-High volatility means moderate hit rates with bonus features carrying the variance — start at the lower end so you have enough spins to see Bonus Game triggers (~1 in 200). The bet applies across the entire 6×7 cluster grid automatically.

Hit spin or use autoplay. The 6×7 grid fills with deep-sea symbols. Wins resolve through Cluster Pays — 5+ matching symbols touching horizontally or vertically. After every winning cluster, gems vanish and new ones cascade in. That's the Avalanche backbone — every spin is potentially several wins stacked into one.

Each exploded position leaves a bubble behind. Hit that same spot again on the next cascade and the multiplier doubles — 2x becomes 4x, 4x becomes 8x. Long Avalanche chains turn the grid into a multiplier minefield, with multipliers compounding through repeated explosions on the same positions.

Three Clam types modify the grid in distinct ways. Pearl locks specific feature symbols for a redrop. Squid sprays extra wilds across the grid. Starfish blasts a row and drops fixed multipliers in the trail. Each Clam type compounds with Oxygen Bubble accumulation — the X-iter menu's 25x tier guarantees Clam appearances.

Land 3 treasure chests for the Bonus Game with persistent multipliers between spins. The Oxygen Meter charges on wins and upgrades multiplier clusters across the round. The Super Bonus tier features persistent Oxygen Meter multipliers — that's where the path to 25,000x runs almost exclusively.

Bonus Buy via X-iter starts at 100x (avg return ~~70x, RTP 96.0%). ELK Studios' five tiers: 2.5x for boosted trigger odds, 5x for double-trigger chance, 25x for guaranteed Clam features, 100x for the regular bonus, 250x for Super Bonus. RTP stays at 96.0% across all entry points. UK and Sweden block bonus buys by regulation.