So to tame this beast you will need:

Pump Action Shotgun (with Ammo)

Metal Gates

Definitely Narcotics (Depends on the level)

Giant Bear Trap

And another Pump Action just in case the first one breaks

So you will need this tame: Mainly Argentavis or a tanky and fast tame that can fit through metal gates

Tutorial: You need to find a Acrocanthosaurus, These mainly spawn on the RedWood, (Center,Island,Astraeos) Carno Island, (Island) and the Dunes, (Scorched Earth and the Biodome in Extinction),

So to finally tame this beast you need to get the Argentavis and build the metal gates near the Acro, you have to get its aggro and lead it to the gates, trap it with the giant bear trap, and place the final metal gate to fully trap it, use the shotgun to shoot it until it goes into a pose, that is the protection or shield pose, you need it to go into that, you keep shooting it until it roars, run to its mouth, and feed it the Narcotics, repeat this until it knocks out. Now kill some dinos or get some Raw Meat, but definitely Prime Meat to feed it and there you go! You tamed my Favorite ARK Modded and Official Tame! The Acrocanthosaurus.