Zombie Lab

Zombie Lab Game Overview

With its explosive wilds, spine-chilling free spins, and twisted zombie-lab theme, Besoft’s Zombie Lab is a feature-rich slot game packed with high-stakes action. It features 5 reels, 25 paylines, and a maximum win of up to 40,000x your stake. The RTP stands at a solid 97%, and the high volatility means this one’s built for risk-takers. Players can trigger up to 13 free spins, chase four jackpots and multipliers, and even take a shot at doubling their winnings with the built-in gambling feature.

Pros

• Solid max win of 40,000x
• Great RTP at 97%
• Free Spins bonus round

Cons

• High volatility may not suit all players
• Bonus buy can be expensive

Zombie Lab Slot Review

Zombie Lab pulls you into a radioactive hellhole where every spin takes you deeper into a zombie-infested lab. The game’s sickly green colour palette, gritty graphics, and tightly drawn characters make a strong first impression. From the thumping background sounds to the frantic soundtrack that speeds up with every win, there’s a real sense of tension in the air.

 

It’s clear the developers have focused on every detail to create a fully immersive experience. I’m here to share how it played out for me, so sit back and enjoy the ride.

Theme

As the name suggests, the theme of Zombie Lab is based on Zombies giving in a horror vibe. It tends to grab attention right away. One can feel like they have entered a chaotic world where a virus outbreak has turned a research facility into a war zone. The mix of cold laboratory equipment, biohazard visuals, and mutated characters adds depth and urgency to the setting, which, in my opinion, was essential to add intensity to the gameplay.

Our main character is a lady scientist fighting to survive the outbreak. I also noticed how the visuals and story elements work hand in hand to keep the tension alive, making every spin feel like part of a survival mission.

Graphics, Sounds and Animations

The neon-green palette stands out in the graphics of the Zombie Lab slot and really emphasizes the toxic lab environment. Right from the eerie background glow to the symbol animations, every visual detail felt polished and purposeful. The character designs leaned into a comic-book aesthetic without giving the feel of being too cartoonish.

I always look forward to listening to the soundtrack in slot games online, as it tends to bring out something unique to the game and its atmosphere. Well, Zombie Lab didn’t disappoint me at all. The ominous soundtrack builds suspense, and mechanical bleeps during spins add to the the sci-fi vibe.

RTP, Payout and Volatility

The Zombie Lab RTP stands at 97%, which is a nice touch for a highly volatile slot. The return-to-player percentage of Zombie Lab is higher than most of the slots I’ve played recently, which tend to hover around the 95–96% mark. This means better long-term value, and I definitely felt like my balance held up longer during my session. It’s a good pick if you’re looking for something that doesn’t drain your bankroll too quickly, despite the high volatility.

The payout potential is where Zombie Lab really sets itself apart. With a solid max win of up to 40,000x, it’s not the biggest out there, but it’s definitely impressive. Although hitting that jackpot won’t be easy, I noticed that even mid-tier combinations paid quite decently, especially when the multiplier mechanic kicked in.

Gameplay

As for the symbols, I found a mix of low-paying card icons and high-paying themed symbols like jars filled with green liquid, medical equipment, and eerie lab setups like a bloody chair or a keychain. The highest-paying symbol, the jar with green liquid, delivered solid returns even in standard combinations, and things got even better when wilds came into play.

The wild symbol is represented by a mutated scientist, clearly transformed into a zombie, and it substitutes for all other symbols except scatters. It often helps complete bigger combos and boosts payout potential.

The scatter symbol is portrayed by a female scientist character and plays a key role in unlocking the Free Spins feature. When I landed three or more scatters, the bonus round kicked in, and each win came with an increasing multiplier, making even smaller wins feel far more rewarding.

Here’s more about the symbols’ payout for a €1 bet:

Symbol	5 of a Kind	4 of a Kind	3 of a Kind
Jar with green liquid	100×	40×	16×
Two jars	70×	30×	12×
Bloody chair	50×	20×	8×
Keychain	40×	12×	6×
A	24×	8×	4×
K	24×	8×	4×
Q	20×	6×	2×
J	20×	6×	2×

Features

Zombie Lab is not only about the eerie atmosphere, it also includes several features that keep the gameplay interesting and full of surprises. From free spins to multiplier bonuses, I discovered that these mechanics can really shift the momentum of a session. If you’re after a slot with even more elaborate features, check out some of the top online casinos where feature-rich games are front and center.

Free Spins Bonus Round

I activated the free spins feature by getting three scatter symbols. When triggered, I was rewarded with a number of spins that were played out on an upgraded reel set. The thrill in this round was that wins during free spins felt considerably more powerful due to the multiplier mechanism stacking on top of the bonus.

Progressive Multiplier

This is definitely one of the highlights of Zombie Lab. Following each consecutive win, I found my multiplier doubled, beginning at 2× and increasing quickly. It was somewhat reminiscent of Sweet Bonanza’s tumble multiplier, except that this one’s attached to win streaks instead of symbol collapses. It actually provides a sense of tension, particularly on bonus rounds.

Gamble Feature

After any win, you have the option to gamble your winnings for a chance to double them. It’s a simple pick, a red or black card color, but if you’re wrong, you’ll lose everything. Use it wisely, especially after a solid win.

Jackpots

The Zombie Lab slot machine also features four jackpots, Mini, Major, Grand, and Special, which are visible above the reels. However, the game doesn’t explain exactly how these jackpots are triggered. Since I played in demo mode, I couldn’t confirm the exact mechanics.

Buy Bonus Option

If you’re as impatient as I am, you’ll enjoy the Buy Bonus option. I bought it a few times to skip straight to the free spins. It’s a great shortcut if you’re chasing big wins or just want to jump into the most exciting part of the game. Just keep in mind that it costs 100x your bet, so it can be pretty expensive.