Manta Mayhem

Manta Mayhem is an underwater-themed online slot developed by Play'n GO, released on 14th May 2026. The game takes players beneath the ocean surface on a 5-reel, 20-payline grid where marine creatures serve as the main symbols.

Play'n GO built this slot around a pearl-collecting mechanic tied to a Manta Ray that hovers above the reels. During the base game, Pearl scatter symbols land on the reels and are collected by the Manta Ray, which can randomly trigger the Clam the Prize feature. This collection system adds an ongoing layer of interaction to every spin.

The slot stands out through its Free Spin Boosters system. Rather than offering a single free spins mode, Manta Mayhem awards boosters that modify the bonus round with sticky wilds, stacked high-paying symbols, extra spins, random wilds, and win multipliers. Players can also activate the Go Ultra mode for an extra 50% of their total bet, which enhances triggered features by adding one more free spin and one more booster.

Manta Mayhem uses multiple RTP configurations. The 96.2% setting is the highest available, but operators can choose lower options. Always check the RTP at your chosen casino before playing.

Manta Mayhem is set on the ocean floor, with a deep blue backdrop filled with coral reefs and aquatic vegetation. The colour palette leans heavily on blues, teals, and purples, creating a consistent underwater atmosphere across every element of the game.

High-paying symbols feature four cartoon-style sea creatures: a fiery red fish, a purple eel, a blue octopus, and a green shrimp. Each is drawn with bright colours and expressive faces. Low-paying symbols are standard card values — A, K, Q, J, and 10 — styled as coral and water formations that match the ocean setting.

The Wild symbol takes the form of a golden coral "W," while the Pearl scatter sits inside an ornate shell. During free spins, a flaming Sticky Wild variant appears, adding visual contrast to the cooler underwater tones. Animations are smooth, with symbols reacting to wins and the Manta Ray moving above the reels as it collects pearls.

Playing Manta Mayhem follows a standard process. Set your bet using the controls at the bottom of the screen. The betting range runs from 0.10 to 100 per spin, making it accessible to both low-stakes and high-stakes players.

Press the spin button to start. Wins are formed by landing three or more matching symbols on one of the 20 fixed paylines, starting from the leftmost reel. The paytable, accessible through the game menu, displays all symbol values, payline patterns, and feature details.

An autoplay option is available for hands-free sessions, allowing you to set a number of automatic spins with optional loss limits and single-win limits. The game also includes a quick spin toggle to speed up gameplay. Sound and other display settings can be adjusted through the settings menu.

Pearl Scatter and Clam the Prize

The Pearl symbol appears once per reel during the base game only. When it lands, the Manta Ray above the reels collects it. Collecting a Pearl can randomly trigger the Clam the Prize feature. The number of Pearls collected does not affect the chance of triggering it — every collection carries the same random probability.

Bonus Buy Option: No

Free Spin Boosters

When free spins are awarded, players receive boosters that modify the round. The available boosters include:

• Extra Spins — Adds 2 or 4 additional free spins to the round.
• Stacked High-Paying Symbols — High-paying creature symbols appear stacked on the reels during free spins.
• Sticky Wilds on Reel 2 — Sticky Wild symbols land on reel 2 and stay in place until free spins end.
• Sticky Wilds on Reel 3 — Sticky Wild symbols land on reel 3 and remain for the full round.
• Sticky Wilds on Reel 4 — Sticky Wild symbols land on reel 4 and hold position throughout.
• HP Wild — One high-paying symbol is randomly selected to become a Wild during free spins. A maximum of one HP Wild type is active per round. HP Wilds pay the same as the standard Wild.
• Random Wilds — 2 or 3 random Wild symbols are placed on the reels each spin.
• Win Multiplier — All wins during free spins are multiplied by x2, x5, or x10.

Bonus Buy Option: No

Go Ultra

Go Ultra is an optional mode that costs an extra 50% of the total bet per spin. When activated, any triggered feature receives an enhancement: the number of free spins increases by 1, and the number of Free Spin Boosters increases by 1. This enhancement only applies to features triggered while Go Ultra is active.

Bonus Buy Option: No (Go Ultra is a per-spin toggle, not a direct bonus purchase)

High-Paying Symbols

Low-Paying Symbols

Special Symbols

The Wild symbol is a golden coral "W" that substitutes for all symbols except the Pearl scatter. It is also the highest-paying symbol in the game:

The Sticky Wild appears only during free spins as a booster reward. It can land on reels 2, 3, or 4 (or any combination, depending on the booster awarded) and remains in position until free spins end. Sticky Wilds and HP Wilds substitute for all symbols except the scatter.

The Pearl is the scatter symbol. It lands once per reel in the base game and triggers the Clam the Prize feature when collected by the Manta Ray.

Wins in Manta Mayhem are paid when three or more identical symbols land on one of the 20 paylines from left to right, starting from reel 1. The Wild symbol can replace any regular symbol to help complete winning combinations. Only the highest win per payline is paid.

The main path to larger wins runs through the free spins round. Free Spin Boosters stack to create different combinations each time. Landing sticky wilds alongside a win multiplier booster, for example, can produce significantly higher returns than the base game. The maximum win is capped at 9,000x the total stake, though reaching it is extremely rare — the probability is less than 1 in 1 billion spins.

Go Ultra mode increases the chance of getting stronger bonus rounds by adding one extra booster and one extra free spin to any triggered feature, at the cost of a 50% higher bet per spin.

As of its May 2026 release, there are no alternative versions or sequels to Manta Mayhem. Players who enjoy underwater-themed slots from Play'n GO may find similarities in titles like Pearls of Aphrodite or Octopus Treasure, which share marine settings and bonus-driven gameplay. However, the Free Spin Boosters system in Manta Mayhem is distinct from the mechanics used in those games.

Manta Mayhem delivers a well-structured slot experience with its booster-based free spins system and pearl collection mechanic. The high volatility (9/10) and 9,000x max win make it suited to players who prefer longer sessions with the potential for larger payouts during bonus rounds.

Its main strength is the variety that Free Spin Boosters bring — each bonus round plays differently depending on which modifiers are awarded. The Go Ultra toggle adds an extra layer of control for players willing to increase their bet for stronger features.

The 96.2% RTP at its highest setting is competitive, but players should verify which configuration their casino uses. The extremely low max win probability is worth noting for anyone setting expectations.