Best New Online Slot Releases This Week - May 21st, 2026

Ready for a new week of brand new slots?! We’ve got the lowdown on those that have been released into the online slots world and have picked out some of the top picks if you’re looking for something new.

The biggest studios have once again been working hard to bring something new to the board, with Pragmatic Play, Hacksaw Gaming, Blueprint Gaming, and many more all involved.

With so many to pick and choose from this week, I’ve looked at the three that I think are worthy of a spin below and have provided you with the top UK online casinos where you can find them and start enjoying them as part of your online slot experiences!

The Big Dog House

A staple of the Pragmatic Play catalogue of slots since 2019’s initial release, ‘The Big Dog House’ is an exclusive release at Bwin that has been made available this week. This one differs slightly from previous iterations in the library, with more bonus features and extra gambling options being noted.

The same fun graphics and visuals remain, as you’ll be greeted by a colourful 5x3 grid inside the doghouse. It’s a simple game to play and understand, with 20 paylines, with wins awarded for combinations of 3+ identical symbols from left to right. With medium volatility, this game has a return-to-player rate of around 96.53%.

Wild multipliers remain a key part of this game’s makeup, as they can appear on the middle three reels as 1x1 normal, 1x3 Expanded, or 3x3 Colossal symbols. Three different scatters are available, with three different bonus features available; all are free spins rounds, with different modifiers available.

You can check out this game and others exclusively at Bwin.

Red Rascal

Released by Hacksaw Gaming this week, ‘Red Rascal’ takes players on a trip to a funhouse with a twist: it has been taken over by ‘a devilish rascal’, which has left the clowns becoming evil and going to the funhouse, a potentially scary experience for those brave enough to take it on.

Visually, it’s an interesting game with some brilliant drawings, but does the standard hold up in terms of gameplay? You can expect to play on a 5x5 grid with 19 paylines, with payouts up to 20x your stake. It’s highly volatile and has an RTP of around 96.34%, which is close to the industry average.

What makes this game better is its multiple bonus rounds. The ‘Rascal Respin’ mode is a special mechanic that has been added; it can reward players with cash prizes or additional wilds. The symbols that land can come in many shapes, and can also be combined for greater rewards. There are also three different free spins rounds that can be triggered, depending on the scatters you land.

You can enjoy this cartoon-like game and others at Betnero.

Vegas Vault

Push Gaming’s latest release ‘Vegas Vault’ uses a narrow gameplay grid that consists of a 3x5 matrix, using a single active payline, making this game extremely simple to understand and play. What’s more, the max prize is 8,976x the stake with an RTP rate of 96.36% and low-medium volatility!

You’ll be taken into a game that uses a casino heist theme, although in true Vegas form, there’s plenty of bright lights. You’ll need to land the icons that appear in the central row to activate a reward. If you land the two prize symbols together with a vault symbol, you’ll activate the bonus game.

A standard respins mechanic is used for the bonus feature, with prize symbols locking in place and giving three respins. If more prize symbols appear, the respins start again. Other bonus features are available in this simple game.

Play it now and other Push Gaming titles at BetMGM.