The quest for a simple "complete quest" console command in The Witcher 3 is a wild goose chase—it never existed. However, the fact that you can still use the addfact command in the latest versions of the game, from Patch 1.32 to the Next-Gen Patch 4.03, firmly disproves the theory that the functionality was deliberately "patched out." The feature is still there; it has just always required the manual activation of specific quest flags.
