ELK Studios

Oxygen

Aquatic cluster slot driven by reactive position multipliers

SlotRanker Score

/ 99

05099

The SlotRanker Score is calculated from the visible data below. It is not affected by affiliate deals, and it cannot be bought.

How this score is built

RTP

94%

return to player

Volatility

High volatility

variance

Max win

25,000×

top multiplier

Min bet

$0.20

per spin

Reels

7 lines

Player rating

4.8 ★

12 votes

DEMO Play free, no signup

ELK Studios

Embed on your site

4.8 / 5

12 ratings

User ratings are shown separately from the Slot Score unless stated otherwise.

Five weighted signals shape the composite. Four context signals refine ties. See how we rate for the full methodology.

Payouts & RTP6/10

RTP 94% → 6.0/10

Volatility9/10

high → 9.0/10

Win Potential8.8/10

x25000.00 (25000×) → 8.8/10

Features10/10

21 features → 10.0/10

Game Mechanics8.6/10

f=21 r=6 p=n/a → 8.6/10

Context signals (tie-breakers)

Layout5/10

6x5 → 5.0/10

Bet Flexibility6/10

0.2–100 (×500) → 6.0/10

Provider Reputation7.1/10

provider avg 7.1 → 7.1/10

Popularity7.5/10

synthetic proxy → 7.5/10

Popularity blends real player search demand (~30 markets) with a catalogue-derived proxy; games without measurable search demand use the proxy alone. Not live play telemetry.

Cite this score

SlotRanker Score: 77 — Oxygen by ELK Studios

https://slotranker.com/elk-studios/oxygen#score

How to cite

Slot Summary

Coral Creek's isolated undersea habitat gives Oxygen a reason for its volatile mechanics: small changes can set off much larger reactions. ELK Studios uses winning combinations to strengthen position multipliers, then clears symbols for further drops and transformations. The x25000.00 ceiling and high volatility favor rare, forceful outcomes, while the later Oxygen 2 confirms that Coral Creek became a continuing series setting rather than a one-off scene.

How It Plays

Cluster Pays and Cascading combine so that a completed win clears space for another symbol drop. Successful positions also gain stronger multipliers before the next result is evaluated.

The sequence rewards connected wins rather than isolated line hits. Colossal Symbols and Expanding Symbols can alter how much of the grid participates in each cascade.

Theme & Atmosphere

The Sea setting is Coral Creek, an isolated ridge whose environment has produced unusual hybrid inhabitants. That premise makes instability part of the fiction as well as the play pattern.

Fish imagery supplies the recognizable aquatic layer, while the altered creatures give Oxygen a stranger identity than a conventional fishing or underwater-treasure slot.

Fish Sea

Features & Win Potential

Multipliers stay attached to winning positions and increase when those positions contribute again. Cascading results can therefore revisit strengthened areas before the sequence ends.

Expanding Wilds, Random Wilds, and Colossal Symbols change the occupied space rather than merely adding another pay symbol. Their value depends on how they intersect with Cluster Pays.

Bonus & Free Spins

Landing 3 triggering symbols starts Free Spins with persistent multiplier values. A trigger containing a persistent multiplier opens the stronger bonus version instead.

Bonus Buy provides a direct route into the bonus play, but the central rule remains unchanged: multiplier values persist while new winning drops continue to test the grid.

Spec sheet

Oxygen at a glance.

Identity

Slot nameOxygen

StudioELK Studios

Released12/12/2023

Math

SlotRanker Score77

RTP94%

VolatilityHigh volatility

Max win25,000×

Bet range$0.20 – $100.00

Player rating4.8 / 5 · 12 votes

Format

Reels6

Paylines7

Layout6x5

Expected average based on this slot's 94% RTP — individual sessions vary with volatility.

Bet per spin

Spins per hour400

Session length (hours)

Cost per hour$4.80

Cost per session$4.80

Estimate only, for entertainment purposes — treat gambling as entertainment, not a way to make money, and set a budget you can afford to lose.

How long could a bankroll last on Oxygen? We simulate thousands of sessions from this game's published RTP and volatility — the long-run math, not a prediction of your next spin.

Bankroll ($)Bet per spin ($)Speed

Volatility tier: High

Running simulation…

How this works

Each simulated spin either misses or returns a win drawn from a log-normal distribution, with the hit rate and spread set by the slot's volatility tier (High). The model is calibrated so the average return equals this slot's published RTP (94.00%), with wins capped at its top multiplier (25,000×).

This is a simplified, parametric model of the game's math — not its real paytable. It exists to make the house edge visible over many sessions, so the numbers above are averages across thousands of runs, never a forecast of one.

This is math, not a prediction. Real sessions vary wildly, and no strategy changes a game's built-in house edge. Play for fun, set limits, and never bet more than you can afford to lose.

Where to play Oxygen

No matching casinos for your region yet

Casino availability depends on where you play from. We only show casinos that accept players from your country.

Compare Oxygen with other games

	Oxygen Score 77This game	Big Bass Hold and Spinner Megaways Score 89	Jawsome Score 89	Rise of Triton Score 78	Fish Prawn Crab Bonanza Score 87
Identity
Studio	ELK Studios	Reel Kingdom	Massive Studios	Betsoft	Advant Play
Released	12/12/2023	8/28/2023	3/8/2025	10/12/2023	7/29/2024
Math
RTP	94%	96.7%	96.65%	96.35%	97.02%
Volatility	High volatility	High volatility	High volatility	High volatility	Medium/High
Max win	25,000×	20,000×	50,000×	—	20,000×
Format
Reels	6	6	6	5	6
Layout	6x5	6x7	6x6	5x3	6x4
Paylines	7	147456	Cluster Pays	40	25
Min bet	0.2	0.2	0.2	0.2	0.1
Max bet	100	250	100	100	10
Features
Progressive	—	—	—	—	—
Wild symbol	✓	✓	✓	✓	✓
Free spins	✓	✓	✓	✓	✓
Scatter symbol	✓	✓	✓	✓	✓
Multiplier	✓	✓	✓	—	✓
Bonus game	—	✓	—	✓	✓
Respins	—	✓	—	✓	—

Every number is shown as a delta against Oxygen.

Comparing against

Oxygen

ELK Studios

RTP

94%

Max win

25,000×

Score

Big Bass Hold and Spinner Megaways

+ Bonus Game+ Respins

+ Bonus Game+ Respins− Multiplier

Fish Prawn Crab Bonanza

Explore More Games with Similar RTP

	Provider	RTP	Volatility	Max win	Score
Scopa	Habanero	93.96%	High volatility	4,000×	67
Carnival Cow Coin Combo	Light & Wonder	93.97%	High volatility	30,000×	71
Dream Drop Diamonds	Relax Gaming	93.98%	High volatility	10,640×	66
Flying Hippo	Pragmatic Play	93.99%	High volatility	5,000×	68
Oxygen	ELK Studios	94%	High volatility	25,000×	77
Cash Truck 3 Turbo	Quickspin	94%	High volatility	40,000×	78
Thunderstruck Stormchaser	Stormcraft Studios	94.01%	High volatility	10,200×	75
Masters Of Olympus	Snowborn Games	94.02%	High volatility	20,000×	77
San Quentin 2	NoLimit City	94.03%	High volatility	200,000×	76
I Hate Fairytales	Elysium Studios	94.04%	High volatility	33,934×	78
Cash Truck	Quickspin	94.05%	High volatility	25,000×	76