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Which online slot games have the best bonuses?

Which online slot games have the best bonuses?

It’s fair to say that online slots are a digitalized version of the classic fruit machines that were commonly found globally in casinos, pubs and clubs. However, converting from mechanical reels to computerized games has led to waves of innovative features, such as bonus games, being added.

Hilda Workman
Oct 04, 2021

Table of Contents

It’s fair to say that online slots are a digitalized version of the classic fruit machines that were commonly found globally in casinos, pubs and clubs. However, converting from mechanical reels to computerized games has led to waves of innovative features, such as bonus games, being added. 

You can check for a comprehensive list of online slots with outstanding in-game bonuses, but let’s take a deep look at some of these features so that you can decide which ones you think are the best. Slots have dominated online casinos for more than 20 years, thanks to their lengthy history in the sector, but it’s the potent combination of them being easy to play with massive jackpots tick all the right boxes for the perfect gambling game. Below is our breakdown of which slot games offer players the best bonuses:

Progressive Jackpots

We might as well start with the big one. Progressive jackpots are arguably the greatest bonus feature of them all, simply because the payouts can be out of this world. To whet your appetite, the largest jackpot to date is €18,915,872.81, which was won on Microgaming’s Mega Moolah.

Progressive jackpot slots come in several shapes and sizes, but many would agree that the top three games in this category are Mega Moolah, NetEnt’s Mega Fortune, and Playtech’s Jackpot Giant. While each one offers a progressive bonus feature, they are quite different.

  • Mega Moolah: You can play it with any stake, but the more you bet, the better your chance of landing the feature. The progressive jackpot is randomly triggered after any spin (win or lose). When the feature is triggered, the screen changes to the Jackpot Wheel. You get one spin of the wheel from which you’ll win one of four progressive jackpots: Mini, Minor, Major, or the big one - Mega.
  • Mega Fortune: This progressive can also be played on any stake level. The feature is triggered when you land three bonus symbols on the consecutive reels (3, 4 and 5). When this happens, the bonus wheel appears. There is an outer wheel with two inner wheels. The wheel needs to stop on the arrows, so you progress into the centre, where you win the mega jackpot. There are two smaller progressive jackpots on the wheel and lots of win multipliers too.
  • Jackpot Giant: There’s no bonus wheel on this slot. All it takes to win the progressive is for five wild symbols to land on payline 1 (the middle row). However, you can only win the progressive if you play the maximum bet.

Free Spins

The majority of online slots have a free spins bonus round, which is a testament to how adored this feature is. As the name suggests, when this bonus is activated, the player receives a set number of free games (spins). Often, there will be other benefits, such as all wins are multiplied, or the free spins have sticky wilds, so it’s more likely to land consecutive wins. 

It’s difficult to pick which slot is best for free spins, as there are so many to choose from. However, Blueprint Gaming’s Fortunes of Sparta offers up to 100 free games, and IGT’s popular Siberian Storm can reward you with a mind-blowing 240 free spins.


Multipliers are straightforward - they multiply the payout by a set amount. For instance, three cherry symbols may pay 50 coins, but with a 2x multiplier, the payout is 100 coins. Some online slots, such as NetEnt’s Drive Multiplier Mayhem, use this bonus as the primary feature. It has multipliers on every reel: 1st reel has a 1x multiplier, 2nd reel has 2x, and so on to the 5th reel with a 5x multiplier. What’s exciting about this slot is that the multipliers can multiply if they appear on the same payline. For instance, if you land the 3x, 4x, and 5x on a winning line, the payout is multiplied by 60x.

While that's pretty impressive, it’s nothing compared to NextGen’s 300 Shields. This slot has a free spins bonus game with all wins multiplied by 300x. You need to collect 12 shields before you unlock this special round, but it’s worth the effort, don’t you think?


The respin feature is basically a free spin, but these are found in the base game rather than a special bonus round. Starburst is probably the best-known slot with a respins mechanic. It offers players the chance to win up to three consecutive respins with expanding wilds locked in place to the middle reels. As Starburst pays both left to right and right to left, the win potential is enormous.

Another top slot for respins is Skywind’s Respin Mania. This retro-looking game gives players a free respin after every win. The winning symbols are held in place and if another matching symbol or a wild appears, then the respin feature continues. This is a highly volatile slot, which either eats up your bankroll or payouts big bucks.


As you can see, there has never been a better time to dive into the world of slot machines, given the sheer number of titles available and the mouth-watering jackpot amounts that can be won. Long gone are the days of slow, clunky browser base gambling games that required players to be sat in front of a desktop PC, nowadays with the advancement of both tech and widely available high-speed mobile internet, new game titles are being released weekly, catering to all tastes and keeping gamers excited.

Hilda Workman | Hilda likes to write about news and fashion.


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