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Last Updated: November 20, 2023

Written by Yvonne Greenwood

September has arrived and the nights are drawing in; whilst for many in the UK this signals the end of summer, for us it is the beginning of the online casino and slots season! Developers usually save their best slot games for the Autumn and Winter months and judging by Septembers releases, they have not disappointed.

We have chosen for you our top 20 slot games in September. As always, you can play all of the online slots listed on this page at the best slot sites.

Here are the top 20 new online slot releases in September 2021.

Divine ImmortalsElectric ElephantSeptember 9 2021
Irish Gold 2021Blueprint GamingSeptember 10 2021
Underwater RichesFBMSeptember 12 2021
Demi Gods VSpinomenalSeptember 15 2021
Dwarven Gems MegawaysIron Dog StudioSeptember 15 2021
Prosperous BloomDragon GamingSeptember 16 2021
Power BisonGong Gaming TechnologiesSeptember 17 2021
Monster BloxPeter & SonsSeptember 18 2021
Sea TreasuresDragon GamingSeptember 19 2021
Zombie BonusPlayStarSeptember 21 2021
Skadi’s HuntIGTSeptember 21 2021
Red Hot SlingoSlingo OriginalsSeptember 21 2021
Hello ParisSpearHeadSeptember 21 2021
Great EmperorGreenTubeSeptember 25 2021
Vice SquadDesign Works GamingSeptember 25 2021
Croc ChaseLightning BoxSeptember 27 2021
Rumble Rhino MegawaysPariplaySeptember 28 2021
Gods of RockThunderkickSeptember 29 2021
Midas MatchIGTSeptember 30 2021
Brian Lara Sporting LegendsVikingsSeptember 30 2021


September is set to be a bumper month with a record number of online slot releases so far this year. Smaller developers such as Spearhead, GreenTube and Peter & Sons have really looked to push the boat out with their releases. We hope that plenty of new slot sites pick up their games so that you can play them.

With that being said, the usual players have not slowed down with their releases either. IGT have come out with the original looking slot, Skadi’s Hunt whilst Pariplay and Thunderkick have released Rumble Rhino Megaways and Gods of Rock, respectively. Unsurprisingly, our partners at Megaways Casino are eagerly anticipating the release of Rumble Rhino Megaways and are set to offer the game once its launched.

We recommend taking advantage of the numerous free spins no deposit bonuses on offer at multiple casinos, this way you can test out the newest online slot games for free. Alternatively, help yourself to cashback casino bonuses so that you can claim money back on all of your losses to use on online slots!

Due to the continued popularity of Slingo online slot sites, Slingo Originals are looking to push home their advantage by releasing another Slingo game, Red Hot Slingo. SLingo slots are a mixture between slot games and bingo and offer lots of excitement. Don’t be surprised to see further Slingo games released as we head into 2022.

Once again, due to the competition between online slots developers, September 2021 will showcase plenty of slots with large payout rates and competitive RTP levels. Like most Megaways slots, we expect Rumble Rhino Megaways to offer high payouts. We always recommend playing best payout slots as well as the highest RTP slots in order to get the best value for your cash.

The 20 September slot releases listed above are the tip of the iceberg. With well over 200 new online slot launched this month, September is a fantastic time to be an online slots player!


Gods of Rock from Thunderkick is my online slot pick for September. For year’s Thunderkick have been one of the world leading slot developers and in 2021 they remain one the best. A maximum payout of 20,000x as well as charged wilds, dropping symbols and reel multipliers ensure lots of excitement. The RTP is around average at 96.05% and you can bet between £0.05 and £100 per spin.


Yvonne Greenwood

Greetings, I’m Yvonne Greenwood

Yvonne Greenwood is our talented writer. In the office she goes by the nickname ‘The Machine’ because of her ability to always smash out excellent and relevant articles for our readers at SlotsHawk.com.

Content writer since 2020