At GDC 2025, developers from CD Projekt Red provided comprehensive insights into their creation of REDKit and emphasized their commitment to perpetuating the legacy of The Witcher 3.

The Witcher 3 has experienced almost a decade of popularity among modders, who have continually enhanced the game by introducing new quests and features. Until recently, modding lacked official support from CD Projekt. However, in May 2024, the company released REDkit, which facilitates easier mod creation and integration.

Why Was There a Delay?

The development process took longer than expected because the team had to reinvent substantial parts of The Witcher 3’s RED Engine within a tight timeframe to guarantee the smooth operation of REDKit for end users. “What works for internal development may not function for modders,” explained Shatulo, indicating that they had to improve interface usability and workflow while adding essential features absent in the original engine.

“We began refocusing on other projects, and as a farewell to The Witcher 3, we wanted to support the modding community to enhance and extend the game’s lifecycle,” Shatulo added. The goal was for modders to create remarkable content, inspiring emerging developers.

Community Engagement

Past interactions between CD Projekt Red and the modding community have resulted in rewarding collaborations, with various modders gaining employment opportunities with the company. Hamburg pointed out the success of REDKit, highlighting positive feedback such as players comparing it to an engine rather than merely a modding tool.

CD Projekt Red plans to continue enhancing the modding community’s capabilities with educational content, facilitating the sharing of modifications and knowledge.