Ghostbutter

Independent game development in Japan

About Me

My name is Konstantin Kopka. Born in Germany, I'm a Japan-based game developer specializing in porting, performance optimization and engine tech.

I spent over a decade creating games as programmer, artist, designer and composer. Fluent in German, English, and Japanese.

I see games as worlds where players can step into the unknown and face their fears.

Konstantin Kopka - Game Developer

The Company

Ghostbutter LLC — Independent Japanese company (合同会社) & studio focused on Switch porting, performance optimization, and transforming technical challenges into polished, hand-crafted experiences.

2025 Launched Ghostbutter Porting services
2022 Established Ghostbutter LLC in Japan
2022 Successfully ported Penko Park to Nintendo Switch
2020 Released Penko Park
2017 Released Wunderdoktor