Mutant Abyss

Mutant Abyss Overview

★★★ Mutant Abyss from KA Gaming is not a slot. It is a multiplayer fish shooter – an arcade cabinet game where you aim a cannon at creatures swimming across the screen and get paid when one dies. It carries a 96% RTP and a high volatility rating, and was released on 15 May 2025.

There are no reels, no paylines and no spin button. All figures below were read from demo play at stakes between $1.00 and $5.00 per shot.

A Flooded Laboratory

★★ The setting is a sunken research facility rather than the usual coral reef: a rusted control room lit blood-red, dead monitors along the walls, a cracked observation dome overhead and a hatch in the floor pulsing red. One capture switches to a cold blue ocean floor with a wrecked hull, and the mood changes completely with the lighting.

What You Are Shooting

★ The bestiary is mutated rather than cute – armour-plated crabs, a glowing jellyfish, a bulb-headed anglerfish and shoals of small red mutants alongside ordinary sharks and seahorses.

★★ Two bosses stand out: a mad scientist in a bloodstained lab coat holding a syringe, and a tentacled siren cradling a red energy orb. Both fill most of the screen when they appear.

Four Seats, One Screen

★★ Labels reading WAITING FOR PLAYER sit at all four corners throughout the captures. Up to four players shoot at the same creatures at once, and the kill goes to whoever lands the finishing shot – so on a busy table, the shot you paid for can be wasted on something another player kills first.

What the Kills Paid

★★ Payouts appear as cash figures floating over the dead creature. At the $1.00 stake: $90.00, $50.00 and $38.78 – the first two being 90x and 50x a single shot. At the $4.00 stake: $60.00, $35.70, $12.00 and $9.54, which is 15x down to a little over 2x.

★★★ At the $5.00 stake the mad scientist went down for $1,000.00 – 200x a single shot, and by a wide margin the largest figure in the session, with a $50.00 coin ring still spinning beside it.

★ Some payouts are not round – $38.78, $9.54, $35.70 – because each creature carries its own multiplier and several small kills resolving together land between the neat figures.

Why the Volatility Rating Fits

★★ A shot costs the same whatever you point it at, but the thing you hit might be worth 2x or 200x, and nothing on screen tells you which before you fire. That is the whole format in one sentence.

★ Two chargeable special weapons sit at the bottom centre, their prices changing through the session – $6.00, $24.00, $28.00 and $30.00 – so the heavy artillery is bought, not earned.

What the Balance Did

★★ The demo runs on a large balance, which makes the arithmetic easy to follow: 95,829.15, then 95,571.15, 95,335.15, 95,239.15, and 95,313.15 after the scientist paid. The balance drifts down by a few hundred while nothing dies, then one boss kill pays most of it back.

Who Should Play It

Mutant Abyss is for players who want an arcade game rather than a slot – something you aim and time rather than something you press. The mutant-laboratory art is a genuine step up from the cheerful reef games that dominate the category.

★ The honest caution is that fish shooters are harder to budget than slots. There is no spin count and no natural stopping point; you spend continuously for as long as you are shooting, and at $5.00 a shot the money leaves faster than any reel game.

★ Neither KA Gaming nor the catalogues publish a maximum win for this title, so we have not quoted one. The largest figure we recorded was the 200x boss kill.

Where to Play Mutant Abyss

You can try this game on Casino007 Online Casino. There’s a unique casino bonus offer of 400% up to £1200 for a limited time.

Mutant Abyss was listed under KA Gaming in all six of our partner casino libraries when we checked on 22 September 2026.