In prim+, use 80 steel pillars (5x5x5) leave an entrance (you put 3 pillars on ground 1 hight) and 5 giant bear traps. The bear traps leave you anough time to place the remaning pillars to trap the giga. With 2 person we used about 1700 tranq with 13 crossbow 100% xD. Long tame but we got a lvl 290.good luck and have fun.
I dare you to raise one!! They are savage if you got two high lvl parents (about lvl 140ish) and you get imprinting on it. The thing will become an adult with about 230% melee and basically one chomp any bronto!!! But on the down side you loose your job and your girlfriend
Make 4 metal dino gates and 1 large bear trap. Place three frames and door into an incomplete square and the large bear trap in the I between them. Lure the Giga into the trap and while its trapped place 4th down to make the square. Then just light it up with tranqs