Cool Buck Slot Review

Provider	Microgaming

Cool Buck is a classic-themed video slot developed by Microgaming, one of the longest-established names in online casino game development. Released in 2017, the 5-reel version of Cool Buck takes the charm of old-school fruit machines and layers on modern mechanics that give it more staying power than a straight retro slot. The result is a game that feels familiar but plays with a bit more depth than its vintage look suggests.

Game Overview

Cool Buck runs on 5 reels, 3 rows, and 9 fixed paylines. The RTP sits at 96%, which is solid for a Microgaming title and comfortably above the industry average. Volatility is rated low, meaning wins land fairly regularly, though the amounts tend to be modest outside of the free spins feature.

The theme leans into a dollar-and-wildlife aesthetic - think playing card symbols, bar icons, stacks of cash, and dollar signs, all rendered in a clean retro style. The headline symbol is the Cool Buck wild, which doubles as the highest-paying icon on the reels.

Betting starts from £0.09 per spin, with a maximum stake of £45. The 9 paylines are compulsory, so the minimum cost per line is £0.01 and the maximum is £5. That range makes the game accessible for low-stakes players without restricting those who prefer larger bets.

Features

Stacked Wilds

The Cool Buck wild symbol substitutes for all other symbols on the reels. In the base game, wilds appear stacked on reels 3 and 4 only, which keeps them relatively contained but can still generate some tidy wins when they align with strong paying symbols. The wild is the highest-paying standard symbol in the game.

Star Collection and Free Spins

There are two ways to trigger the free spins round, which is an unusual touch for a slot at this level of complexity.

The first method is the standard scatter route - land 3 or more Cool Buck scatter symbols anywhere on the reels and free spins begin immediately.

The second is a star collection mechanic. Pink star symbols can overlay any of the card-rank symbols during play. Each star adds one to a running counter displayed on screen. When that counter reaches 30, the free spins round triggers regardless of what else is happening on the reels. The counter resets to 5 after the bonus ends, giving you a small head start towards the next trigger.

During the free spins round, two things change. First, the stacked wilds expand from reels 3 and 4 to all five reels, significantly increasing the frequency of wild-assisted wins. Second, all wins are multiplied by 2x, which applies to every paying combination throughout the feature. These two changes together make the free spins round the main attraction in Cool Buck.

Symbols and Payouts

The symbol set sticks to the classic mould: Ace, King, Queen, Jack, Ten, and Nine card ranks make up the lower-value end, joined by bar symbols, a stack of cash, and a dollar sign. The Cool Buck logo acts as both the scatter and the primary top-paying symbol, with five of a kind at maximum bet returning 6,000 coins. The wild pays out 4,500 coins for a five-of-a-kind line at max stake.

The star overlay symbol does not pay directly but feeds into the free spins counter, so its value is indirect rather than immediately visible on the paytable.

How to Play Cool Buck

Select your stake using the bet controls at the bottom of the screen. Because the 9 paylines are fixed, adjusting the coin value is the only way to change your total bet per spin. Once your stake is set, hit Spin or use the Autoplay function to run a preset number of rounds automatically.

Keep an eye on the free spins counter during play. The star collection mechanic means free spins can creep up on you gradually rather than depending entirely on scatter luck, and tracking the counter adds a layer of engagement to otherwise straightforward base game play.

The stacked wilds on reels 3 and 4 are worth watching for in the base game. When a full stack of wilds lands on both of those reels simultaneously, it can cover a good portion of the 9 paylines and deliver a meaningful payout even without the bonus multiplier active.

Mobile Compatibility

Cool Buck was built on Microgaming's HTML5 platform, so it plays without issues on smartphones and tablets. The simple reel layout scales cleanly to smaller screens, and the betting controls remain easy to use on touchscreens. The low payline count and fixed structure mean there is nothing complicated to navigate on a mobile display.

Verdict

Cool Buck is a solid option if you want a retro-styled slot with a bit more going on than the bare minimum. The dual free spins trigger system is the standout element - the star collection mechanic gives you a consistent, trackable route into the bonus rather than relying purely on scatter luck. Once in the free spins round, stacked wilds across all five reels combined with the 2x multiplier can generate some respectable returns for a low-volatility game.

It is not a slot that aims for huge top payouts or complex bonus structures. What it does offer is steady, uncomplicated play with an interesting twist on how you reach the best feature. For players who like classic themes but want more than three reels and a single wild, Cool Buck delivers that balance without overcomplicating things.

Who makes Cool Buck?

Cool Buck is developed by Microgaming, one of the founding names in online casino software. The 5-reel version was released in April 2017.

What is the RTP for Cool Buck?

Cool Buck has a published RTP of 96%, which is above the industry average for online slots and reflects a reasonably player-friendly return over time.

How many reels and paylines does Cool Buck have?

The 5-reel version of Cool Buck has 3 rows and 9 fixed paylines. The paylines cannot be adjusted, so all 9 are active on every spin.

How do you trigger free spins in Cool Buck?

There are two ways. You can land 3 or more Cool Buck scatter symbols anywhere on the reels, or you can collect 30 pink stars through the star counter mechanic, with each star overlay on a card symbol adding one to the count.

What happens during the Cool Buck free spins round?

During free spins, stacked wilds expand from reels 3 and 4 to all five reels, and all wins are multiplied by 2x. These two changes combine to make the feature significantly more lucrative than the base game.