ELK Studios

Oxygen 2

Slots Video Slots Nature Fish Sea Love Bubbles Bomb

Coral Creek sequel driven by persistent bubble 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

Cluster Pays 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

15 features → 10.0/10

Game Mechanics8.6/10

f=15 r=6 p=n/a → 8.6/10

Context signals (tie-breakers)

Layout5/10

6x6 → 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 2 by ELK Studios

https://slotranker.com/elk-studios/oxygen-2#score

How to cite

Slot Summary

ELK Studios returns to Coral Creek with Oxygen 2, treating the sequel as a feature-dense Cluster Pays game where bubbles preserve and increase Multipliers while wins clear symbols from the field. The 94% RTP and High volatility sit beside a 25000x ceiling, but the defining idea is how transformations, Mega Symbols and several Wild effects reshape later drops.

How It Plays

Matching symbols pay when they connect as a Cluster. A completed win removes those symbols, allowing replacements to fall and potentially form another result in the same sequence.

Bubble positions give repeated hits additional weight. A winning symbol either activates a new Multiplier position or strengthens one that was already active before the next Cascade.

Theme & Atmosphere

The Sea setting revisits Coral Creek as a changed habitat, where Fish and other Nature forms have acquired machine-like traits rather than remaining ordinary marine life.

Bubbles connect the setting to the rules because they mark Multiplier positions. The unusual biological and mechanical mixture gives Oxygen 2 a less tranquil underwater tone.

Nature Fish Sea Love Bubbles Bomb

Features & Win Potential

Mega Symbols and symbol transformations change how much of the field a single payout symbol occupies, creating larger possible Clusters before the following Avalanche.

Different Wild Symbol effects either replace symbols in crossing paths or Remove Symbols from directional areas. Some removals also activate dormant bubble Multiplier positions.

High volatility Free Spins Multiplier Scatter Symbol Wild Symbol Cascading Cluster Pays Bonus Buy Additional Free Spins Avalanche Bonus Bet Free Spins Multiplier Random multiplier Mega Symbol (3x3)Remove Symbols

Bonus & Free Spins

Landing 3 Bonus symbols opens Free Spins with existing Multipliers preserved between drops. Landing 4 starts the stronger mode, adding a random Multiplier enhancement to every free drop.

Spec sheet

Oxygen 2 at a glance.

Identity

Slot nameOxygen 2

StudioELK Studios

Released3/4/2025

Math

SlotRanker Score77

RTP94%

VolatilityHigh volatility

Max win25,000×

Bet range$0.20 – $100.00

Player rating4.8 / 5 · 12 votes

Format

Reels6

PaylinesCluster Pays

Layout6x6

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 2? 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 2

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Compare Oxygen 2 with other games

	Oxygen 2 Score 77This game	Sea of Plenty Score 70	Broadsiders Score 86	Lucky Fishing Megaways Score 77	Cash Reef Score 76
Identity
Studio	ELK Studios	Indigo Magic	Massive Studios	Pragmatic Play	Habanero
Released	3/4/2025	8/11/2022	1/27/2025	12/27/2022	9/15/2016
Math
RTP	94%	96%	96.62%	96.97%	96.16%
Volatility	High volatility	Medium volatility	—	High volatility	High volatility
Max win	25,000×	5,000×	30,000×	5,000×	—
Format
Reels	6	5	7	6	5
Layout	6x6	5x3	4-5-6-7-6-5-4	6x7	5x3
Paylines	Cluster Pays	30	Cluster Pays	117649	243
Min bet	0.2	0.3	0.1	0.2	0.3
Max bet	100	120	100	100	6000
Features
Progressive	—	—	—	—	✓
Wild symbol	✓	✓	✓	✓	✓
Free spins	✓	✓	✓	✓	✓
Scatter symbol	✓	✓	✓	✓	✓
Multiplier	✓	—	✓	✓	✓
Bonus game	—	✓	—	—	—
Respins	—	✓	—	—	—

Every number is shown as a delta against Oxygen 2.

Comparing against

Oxygen 2

ELK Studios

RTP

94%

Max win

25,000×

Score

+ Bonus Game+ Respins− Multiplier

Lucky Fishing Megaways

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01What is the RTP and volatility of Oxygen 2?

Oxygen 2 is listed with 94% RTP and High volatility. Its published maximum win is 25000x the stake.

02How do Oxygen Bubble Multipliers work?

A winning symbol can activate a bubble on its position. Later wins on an active bubble increase its Multiplier while Cascading symbols continue the sequence.

03What happens after a winning cluster?

The winning symbols are removed and replacements fall onto the field. This Avalanche process can create another cluster and reactivate existing Multiplier positions.

04How does the bonus retain Multipliers?

Landing 3 Bonus symbols starts the Free Spins game, where existing Multipliers remain persistent. Landing 4 Bonus symbols adds a random Multiplier enhancement to every free drop.

Series