User blog comment:Adsper/All Possible Mobs/@comment-75.111.239.208-20180619032536/@comment-2001:5B0:45C6:8C60:0:FF:FEBF:47C0-20180624162522

Giga's relative Mapusaurus hunted in packs, and Giga lived a similar life style and hunted the same prey in the same habitat, so there's no reason why Giga wouldn't have hunted in packs to take down the gigantic sauropods as well.

Even if it wasn't completely accurate, it would still be a very cool mechanic to have in the game.