Swedish casino games developer Play'n Go has collaborated with operator Mr Green to create its new Wild West-themed slot Golden Colts.

The five-reel, 40-payline slot transports players to a Wild West with a twist, where they join a team of bounty hunters trying to track down a zombie sheriff to steal a pair of golden Colt firearms back from him.

Players are helped on their way by the Bull wild symbol and a bonus scatter symbol appearing as a colt box with a skull design. Landing three of these scatter symbols on the reels triggers the Golden Colts bonus game, which randomly delivers one of seven bonus features. These range from wilds-scattering, free spin multipliers and a hidden object game.

The game has been developed in partnership with Mr Green, with representatives from both parties working on the game's concept and design.

"As part of our drive to provide operators with the best games and service on the market, it made perfect sense for us to commit to a collaborative design process for Golden Colts with Mr Green," Play'n Go chief executive Johan Törnqvist explained.

"Using their different perspective and knowledge of the customer has provided us with a unique insight into delivering yet another quality game."

Mr Green's head of gaming portfolio Ben McDonagh added: "Play'n GO continues to produce some of the most innovative and premium slots in the casino sector, so leveraging its expertise to create Golden Colts for our own players was a really exciting approach.

"The title showcases the unique features and bonus games for which Play'n GO is known, and we hope to build on this innovative process with further partnerships in future."