Oxygen Slot Review

The Oxygen Slot Game

Oxygen is a 6 reel, 7 row cluster slot from ELK Studios set on the seabed at Coral Creek. Clusters of five or more matching symbols pay anywhere, with avalanches clearing winners and dropping new icons. Bets run from 0.20 to 100 per spin, with a 94 percent RTP, medium to high volatility and a headline max win of 25,000 times stake, so the numbers clearly point towards swingy sessions.

What grabbed me first with Oxygen was how smooth the grid feels once clusters start chaining. The transparent board, shipwreck and coral give you a calm backdrop, yet the multipliers can turn a sleepy spin into a frantic scramble very fast. It is all very straightforward to pick up: form clusters, trigger avalanches, grow bubbles, then hope something meaningful lands on them before the reset between base game rounds.

Symbols and Payouts in Oxygen

The paytable in Oxygen sticks with simple icon sets that fit the deep sea theme. Green, orange and purple gems are your low symbols, paying from tiny returns for five of a kind up to around 10 to 20 times stake for clusters of 14 or more. Above them sit three fish in matching colours plus a gold scuba helmet, which can hand over as much as 100 times stake.

Cluster wins scale quite sharply, so nudging a group from six to seven, or twelve to fourteen symbols makes a noticeable difference, especially on the premium fish and helmet. Feature symbols keep things lively. The treasure chest scatter is what you look for when chasing bonus rounds, while three kinds of wilds can join any cluster, with pure wild clusters paying the same as that top helmet symbol.

From my own play, most spins are carried by small gem clumps, with the better hits usually coming when a big symbol drops in to bulk out a fish or helmet cluster. It is worth spending a minute on the paytable before you start hammering spin, as the step changes between cluster sizes are not always obvious just from watching, especially once multipliers and giant tiles start mixing into the screen.

Symbols and Paytable

Symbol	Quantity	Payout
	14+	x100
	13	x50
	12	x25
	7	x2
	6	x1.5
	5	x1
	14+	x50
	13	x25
	12	x10
	7	x1
	6	x0.75
	5	x0.5
	14+	x30
	13	x15
	12	x8
	7	x0.8
	6	x0.6
	5	x0.4
	14+	x25
	13	x12.5
	12	x6
	7	x0.5
	6	x0.4
	5	x0.3
	14+	x20
	13	x10
	12	x5
	7	x0.4
	6	x0.25
	5	x0.2
	14+	x15
	13	x7.5
	12	x4
	7	x0.3
	6	x0.2
	5	x0.15
	14+	x10
	13	x5
	12	x3
	7	x0.25
	6	x0.15
	5	x0.1
	Scatter
	Wild

Oxygen Slot Bonus Features

Feature wise, Oxygen leans heavily on its big symbols and trio of wilds. Any pay symbol or wild can land as a 2x2, 3x3 or 4x4 block, which counts as multiple icons and helps fill those larger clusters very fast. The regular wild simply substitutes, while the X Blaster wild transforms an X shaped set of positions into one chosen symbol, and the Exploding wild clears an X pattern of regular payers from the grid.

Every winning position leaves behind an oxygen bubble worth x1, and each further win on that exact spot doubles it up to a crazy 2,048x. Random Multiplier Strike drops bubbles around the grid, while Collector drags visible values onto its own cell and Dealer multiplies nearby bubbles in V shapes. Three scatters launch 10 free drops with bubbles carrying over, and X-iter buys let you pay extra for instant access to specific feature setups.

Bonus Buy Feature

Bonus Hunt Buy a game round with more than tripple the chance to trigger a bonus. Cost is 3x the selected bet.
Feature Cost:	x3 Bet
RTP:	-
Volatility:	-
Multiplier Strike Guaranteed multiplier strike. Cost is 10x the selected bet.
Feature Cost:	x10 Bet
RTP:	-
Volatility:	-
Persistent Multiplier Feature Guaranteed persistent multiplier feature. Cost is 25x the selected bet.
Feature Cost:	x25 Bet
RTP:	-
Volatility:	-
Bonus Buy a bonus game. Cost is 100x the selected bet.
Feature Cost:	x100 Bet
RTP:	-
Volatility:	-
Super Bonus Buy a bonus game with a guaranteed persistent multiplier feature. Cost is 500x the selected bet.
Feature Cost:	x500 Bet
RTP:	-
Volatility:	-

How to Win at Oxygen Slot

If you want a handle on how wins actually form in Oxygen, I would start with cheap spins and just watch a few avalanches play out. Clusters of five or more symbols are all that matters; their position on the 6x7 grid is irrelevant, but they must touch horizontally or vertically. Each avalanche sequence feels like a mini round, as multipliers only grow while the current chain of wins keeps alive.

Because the RTP sits at 94 percent and volatility is on the higher side, I treat Oxygen as a game where you need a bit of patience and a bankroll that can handle dry spells. The goal is not just any win, but lining up a chunky cluster over one or more large bubbles. That means some sessions where big multipliers build then never connect, which can be mentally tough if you chase every tease.

The X-iter menu gives you shortcuts, from a light 3x stake Bonus Hunt up to the full 500x Super Bonus with a guaranteed persistent feature. Personally, I only touch the cheaper options, as the 100x and 500x buys can shred a balance when the slot is in a sulk. Grinding standard spins with the odd Multiplier Strike buy thrown in has felt like a more controlled way to approach it.

Oxygen Slot RTP & Volatility

Stat wise, Oxygen runs on a 94 percent RTP model with medium to high volatility and a stated hit rate of around 36 percent. On paper that looks harsh compared with many other cluster slots, and in practice I do feel those long stretches where nothing of note happens. The trade off is proper top heavy potential; when multipliers climb towards their 2,048x cap and actually link with premiums, the grid can explode in style.

The Final Thoughts on Oxygen

After a fair few sessions, Oxygen has settled for me as a volatile but highly entertaining cluster slot that rewards persistence more than quick hit hunting. The underwater presentation, bubbling soundtrack and hefty wild effects keep spins engaging, yet the game is really about working those multiplier bubbles. If you enjoy grids where one good chain can change everything and you are comfortable with risk, this one is well worth a proper spin.

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