: Use event giga_mega.402 to unlock access to the galactic center, where you can build the massive Birch World. Set Core Type :
After running, the planet transforms into the core. You may need to queue its upgrades via the normal Giga interface. stellaris gigastructural engineering console commands link
: The official Paradox Interactive forums often have threads dedicated to console commands and cheats. You can search for threads related to Stellaris. : Use event giga_mega
: Use effect set_global_flag = giga_core_qso to change the black hole into an active quasar. stellaris gigastructural engineering console commands link