Geoff Knorr worked on several video game titles, including what turn-based 4X video game that was developed by Firaxis Games?
Geoff Knorr:  He has worked on video game titles such as "Civilization V", "", "Civilization VI", "Galactic Civilizations III", and "Ashes of the Singularity". Civilization VI: Sid Meier's Civilization VI is a turn-based 4X video game and the sixth main title in the "Civilization" series.
i don't know