Wolf of London Brings Persistent Crystals and 3,095x Wins

Fish & Chips Games has now gone dark side with Wolf of London, its second game launch via Yggdrasil's new champions program. Released into the wild on September 17th, 2026, this Victorian Gothic-themed slot includes expanding reels, free spins, and a unique crystal collection system which allows your progress to carry over across multiple gaming sessions.

An article posted by iGaming Business (the original publisher) discussed how the company has transitioned from comedic British humor with the launch of its first game, Bus Stop Bonanza, to darkened, fog-filled streets, dimly lit gas lamp street scenes and werewolves in Wolf of London.

You can't get the crystals until your reel grid expands

Wolf of London begins with a 5 x 4 reel grid with 1024 winning combinations. However, it doesn’t stop there. Rising Moon symbols will increase up to 3 additional rows and transform the reel grid to 5 x 7. This increased reel size affects one of the game's features. The collectible crystals do not exist until you have added those additional rows.

Therefore, you can not just collect them off the initial 5 x 4 reel configuration. In addition to the new rows, three rising moons will trigger ten free spins. The free spins will be played out on the full 5 x 7 reel configuration. This relationship between expanding your reel grid and having access to your collectible crystals creates a natural progression: larger grids give you more access to the feature set of the game.

Your crystal collections will continue from one gaming session to another

One thing that is very different and unique with Wolf of London is the ability for players to save their collectible crystals from one gaming session to the next. Players can earn collectible crystals by getting five of the same colored crystals together. Once they get five crystals of the same color together, they earn ten free spins, and introduce a super high-paying werewolf symbol of the same color. Unlike a standard progressive collection meter, when you close the game all of your uncollected crystals remain intact and ready for when you start back up.

Also, unlike most progressive collection systems, new players enter the game with three Red Crystals collected already. This places the new players two away from completing their first red set. Saving your progress also impacts what drives players to go back and play a specific slot machine. If players see that some activity still exists when they come back to play, then it creates an incentive for them to come back and continue from where they left off. Phill Taylor, head of region -- Europe for Yggdrasil, explained the system as a "retention driver."

A maximum win amount of 3,095 times bet and multiple RTP options

Wolf of London offers a medium- to high-volatility experience, a hit rate of twenty-three point three percent, and maximum win potential of thirty-nine hundred ninety-five times bet with a maximum monetary payout of $386,875. It should be noted that there are several RTP settings possible with Wolf of London; originally announced at 94% RTP, further details provided list four available RTP options: ninety-point-five percent, ninety-two percent, ninety-four percent and ninety-six percent.

As such, depending upon the operator offering Wolf of London, players may be able to select which RTP option they prefer. In either case, examining the RTP setting displayed in the game's information panel would allow players to determine which RTP level they are experiencing.

Progression beyond individual play sessions becomes more commonplace

While Wolf of London is a fun slot machine that contains werewolves and various elements related to British history, it is ultimately a representation of how slot developers are moving forward with developing gameplay that extends past an individual player's play session. Slot development teams have been using progressive collection mechanisms for years. They typically work as follows: players collect items or money until enough is collected to award a prize. With Wolf of London, however, saving an item(s) previously collected by a player means that the progressive collection mechanism can operate similarly to an RPG-style leveling-up mechanic -- once a player collects something during a play session, their account will remember that item when they log back into the same game.

This method of operation makes a great deal more sense in terms of how long-term player engagement is affected. Operators know that attracting players is often much easier than keeping them engaged in the long run. Creating memorable themes can draw people to try your product initially. Using a similar technique to save players' collections can encourage players to return to your products among numerous competing alternatives. In addition, Fish & Chips Games has developed a distinct brand after only two releases. Its first slot machine, titled Bus Stop Bonanza, used everyday British-themed humor to create comedic moments in its design.

Wolf of London takes the opposite direction, utilizing British-inspired gothic imagery for its design. The overall tone of both slot machines is quite different, yet each slot machine maintains aspects of being British-themed. Ultimately, the way Fish & Chips Games uses persistence in its crystal collection mechanism along with expanding reels and providing free spins on a fully expanded 5 x 7 grid, represents how slot developers can use common slot mechanics and structure them around long-term progression without limiting understanding of individual spins in any way.