Team Tetrapod, the indie developer that successfully introduced domestic mystery games through its 'Stepper' series, showcased its upcoming title, 'Stepper Retro: Psychic Mystery Quest,' at PlayX4 2026 ahead of its official launch.

Stepper Retro is the latest installment in the Stepper series, a mystery franchise that blends psychic powers with deduction. The development team gathered feedback through online demos and various offline game shows, using those insights to create a more refined mystery experience than its predecessors.

"We are pouring a tremendous amount of effort into Stepper Retro," said Team Tetrapod CEO Lee Hee-sang at the event. "We have done our best to enhance the overall quality, including the game's volume."

The game shares the same universe as the previous titles and features some returning characters, continuing the overarching story. However, the perspective, setting, and protagonist are new. CEO Lee noted that the game was designed to be accessible even to players who have never experienced the series before.

The Stepper series is known for its impressive case-solving systems. In this new entry, the developers have retained the core mechanic of combining clues from documents while upgrading the system to be more intuitive and streamlined.

New elements have been added to make the deduction process more diverse. These include the 'Retro System,' a unique feature that allows players to revise their findings during the investigation, and the 'Restory System,' which lets players create a narrative by combining six key documents highlighted in the game.

The game's graphics have also seen a significant upgrade. "By utilizing Spine animation, every character now has unique movements and expressive, lifelike animations," Lee explained. "We have also applied more direct and impactful direction to the cutscenes."

Meanwhile, Stepper Retro is being showcased at BitSummit in Japan concurrently with PlayX4. Through these offline exhibitions, Team Tetrapod is monitoring how users play the game to identify any discrepancies between the intended design and the actual player experience.

"We are huge fans of mystery games ourselves, so we worked hard to create a title that is truly fun and features a compelling story," Lee said in closing. "We would be grateful if fans of mystery and deduction games give Stepper Retro a try."

Stepper Retro is currently in the final stages of development. Stepper Retro: Psychic Deduction Quest is set to launch on July 23 via Steam and Nintendo Switch.