Science Adventure

ChäoS;HEAd (2008)
I ChäoS;HEAd (2008)
ChäoS;HEAd NoAH (2009)
ChäoS;HEAd NoAH (2009)

complete version

Steins;Gate (2009)
II Steins;Gate (2009)
ChäoS;HEAd Love Chu Chu! (2010)
ChäoS;HEAd Love Chu Chu! (2010)

romantic comedy spin-off

Robotics;Notes (2012)
III Robotics;Notes (2012)
ChäoS;Child (2014)
IV ChäoS;Child (2014)
Steins;Gate 0 (2015)
Steins;Gate 0 (2015)

canonical midquel

Occultic;Nine (2017)
Occultic;Nine (2017)
Robotics;Notes DaSH (2019)
Robotics;Notes DaSH (2019)

canonical spin-off

Anonymous;Code (2022)
Anonymous;Code (2022)

https://en.wikipedia.org/wiki/Science_Adventure