If you are riding the Rex and standing on higher ground than an alpha you can Time it just right so that as the wild alpha Rex is running up the hill you can munch his face and knock him back again. Killed many alpha rexes this way without taking any damage at all

When u tame a Rex, they will sometimes let out a roar before they attack what you targeted (if u have it set to “target”) the good thing about this is this roar will put small animals into a temporary stasis, like raptors, dilos, basically anything smaller then a ankleo or trike

Level up the speed so you can go faster than the dinosaur and there would be a time for the narcotics to make him sleep( this works for many dinosaurs)

If you find this big boi, just run

If Your a savage like me just make around 20 tranq arrows and make it chase you. Then you shoot it until it gets knocked out, but this method only works on a low level one

If you see one RUN and always carry a bola to bola any tribe mates or animals along the way

If you don’t want the long set up to tame, lead one like any creature to the bottom of a cliff, fly up or shoot it from the cliff and tranq it. When it starts the run, watch the cliff fall if you’re chasing on foot.

You can find Rex's near beaches and steep mountains

There’s a passive tame walk up to with meat

I go on cliffs and dart them from the top until it gets knocked out kill and large animals preventing it to die and put spikes around it and feed it all the meat you have on you.

Best way to knock out is to make a stone raft and put it slightly in the water so when it knocks it won’t drown. Has to be at least 2 walls high.

If you are feeling a bit lazy when you tame a Rex just lead the Rex to some high terrain like a cliff and fire away. But if you wanna do it the smart way build a trap with a bear trap and while the Rex is in the bear trap close the trap that you led the Rex into

You can usually lay between 1-4 large bear traps down in a line and stand just in front out of reach of them and shoot them with tranq arrows or darts.

Make a stone or metal octagon out of Dino gateways, but leave one for the behemoth. Put a gate in the behemoth, but not the regular ones. Set the behemoths pin code to your preference and close the gate with the keypad AFTER luring the Rex inside. The Rex can’t fit through the regular Dino gateways, but you can, allowing a safe easy tame.

The rock scaling allowed after the TLC phase 1 makes using rocks and even large cliffs illogical, if the cliff has even one section that’s less than a 65 degree angle, that Rex WILL climb it. Even after they nerfed it a little, it can still walk over most anything. I would suggest stone structure pens with a ramp to let it in, it will also derp through even small gaps between the 3 Dino gate strategy, the moment you realize that, it will have escaped and be coming at you.

What you want to do is use a cross now or a normal bow it works just bring a ton of narco arrows and some normal narcos to keep it knocked out make sure you have some other ok battle Dino with you so you can kill what ever is there a use that to tame it

Before you go hunting for meat MAKE SURE YOU PUT UP A SPIKE WALL TO KEEP DINOS YOU DONT WANT OUT

That is very important bye

If you find a cliff and get the rex to follow you, you can shoot down at it with tranq whatever-you're-using until it get knocked out.

Keep under Rex's belly towards tail and fire KO ammo upwards at the belly. It can't bite you near as much because turning circle is so large.

NEVER IN ALL YOUR DAYS fight an alpha rex while a weaker dino is parked elswhere. It will get attacked by something else or the rex will lose interest in you and eat it. I lost a good level quetzal that way. Me and my thyla got revenge but that won’t replace the hours of searching and grinding out darts.

Ride on your pteranadon in every direction you can furthest away from it. Jump off and hit it with all the tranqs you've got.before it gets too close jump on the pterosaur and fly away. Repeat until its down. Never tanq anything in deep water.