Evidence of gambling activities has been dated as far back as the prehistoric Paleolithic Age, also known as the Old Stone Age, so the premise of Rock Vegas Mega Hold & Spin by Reel Kingdom is not too far-fetched. We doubt they had big, flashy Stone Age casinos, but playing around with sticks, bones and rocks was probably not uncommon. Rocks also play a central role in this Pragmatic Play supported release, but only in the bonus round.

The base game is a barebones experience with no extras, not even Wilds, so 750x your bet is the most you can hope for if you’re lucky enough to fill the screen with the top-notch caveman. The Mega Hold & Spin feature plays out on an unusually large 10×10 grid and comes with multi-colored cash tiles that converge to award larger prizes. Overlay keys are collected to move you along the mystery modifier path, getting you close to 10,000x potential .

Rock Vegas Slot Features

You win between 12.5 and 37.5 times your bet when you land 5 premium symbols on a payline, and the caveman is the top tier symbol, followed by a white saber-toothed tiger, a dinosaur and a mammoth. As mentioned above, there is no wild symbol in this game and everything revolves around the Mega Hold & Spin feature.

The Mega Hold & Spin bonus game is triggered when you land 3 scatters anywhere in the same spin, and the feature is played on a brand new 10×10 grid . Only different colored stone symbols or spaces will land, and the blue, green, yellow, pink and red stones are worth 0.1x, 0.2x, 0.4x, 0.6x and 1x of your bet respectively.

However, the feature is improved by landing more than 3 triggering scatters, as 4 triggering scatters remove the lowest value blue stone , while 5 triggering scatters remove both blue and green stones for the duration of the bonus round.

You start with 3 respins and all rocks that land become sticky on the 10×10 grid. You only need to lock 1 single rock to reset the respin count back to 3 , and the feature will continue until you either fill the grid completely or run out of respins.

Larger 2×2 or 3×3 rocks are generated when you land clusters of matching 1×1 rocks, and these larger rocks come with a random prize. The 2×2 large rocks bring prizes between 5x and 10x , while the 3×3 large rocks award prizes from 35x to 500x . In addition, some rocks can land with keys attached to them, and these keys are collected in the mysterious modifier track on the left.

Mysterious chests are unlocked along the way, and these award the following extras:

• A random stone is boosted by a random multiplier between x0.5 and x500.
• An instant cash prize between 10x and 500x your bet is paid out instantly.
• Between 4 and 10 keys are added to the trail instantly.
• A random multiplier between x2 and x100 increases your total win from the bonus round.
• Retriggering the feature allows you to start over once the current feature has ended.

The chests open when you have collected first 3, then 4 keys, and you need 11 keys to reach the end of the test mystery multiplier (the path is then reset and starts over). The latter displays a multiplier between x2 and x100 and increases the total bet multiplier prize you have currently collected. If you fill the grid with sticky stones, the Hold & Spin feature will be triggered again when everything is reset.

The 200 Spins Rock Vegas Slot Experience

Dad many bonus teasers in the base game, and you can see some of them. However, you can safely skip to the 0:50 mark, as that is when the Mega Hold & Spin feature is finally triggered. We managed to fill the entire grid and reach the end of the trail, and thus got a second chance when the feature was triggered again. See for yourself by clicking the play button below.

Summary

There’s something dated about the visual presentation that we didn’t like, but it could be stretched to tie in well with the prehistoric theme. We suspect that the title “Rock Vegas” refers to the “Stone Age Casino” that you are taken into as the trigger for the bonus round, but the base game is a tedious dead-spin and top-up-win grind. All the bonus teasers also get a bit annoying after a while, but the feature itself was pretty refreshing and fun.

First of all, the 10×10 grid stands out from the usual hold & spin features, as do the merging multi-colored stone money symbols. We also like the key collection system that awards very useful extras like retriggers, extra keys and multipliers. The 10,000x potential is also solid, not least given the decent 1 in 2,578,648 maximum win odds. We’d hardly play Rock Vegas for the base game, but the bonus round might resonate with a certain audience.

Pros

10×10 Grid Hold & Spin with Key Collect modifiers.
Mystery total win multiplier up to x100
10,000x potential (with probability of 1 in ~2.57m)

Cons

The base game is a barebones grind
Beware of customizable RTP ranges

Rock Vegas Slot FAQs

What is the RTP of Rock Vegas?

The premium payout percentage of 96.64% is above average, but keep in mind that this version comes with adjustable RTP ranges.

How volatile is Rock Vegas?

Volatility is high in this release from Reel Kingdom (Pragmatic Play), scoring 5 out of 5 on the in-game volatility scale.

What is the biggest possible win?

You can win up to 10,000 times your bet in Rock Vegas Mega Hold & Spin, and the maximum win probability is 1 in 2,578,648.

Is there a free spins mode in Rock Vegas?

Yes, it is a Hold & Spin feature that is played on a 10×10 grid with different colored stone money symbols. These can be matched to award larger random prizes. A key collection trail brings 5 different extras as well as a total win multiplier of up to x100 when you reach the end.

Can I play the Rock Vegas slot for free?

Yes, you can try the free Rock Vegas demo game at the very top of this page at any time (UK players must verify age first).