I tamed a Rex by taking my pteranodon and landing on a rock where the Rex couldn’t reach me and shooting it with tranq arrows until it ran away, then chased it while still shooting it until it fainted. Make sure to take plenty of narcotics to keep it unconscious while taming it though. Up if helpful!

I tried the triangle formation of metal dino gates as per one of the top tips but that didn't work. What did work for me was a four wall box of stone behemoth gates and then kiting the rex into there with a flyer and then closing the rex inside. Make sure you placed the gate box near a high boulder so that you can land there and tranq the rex from above.

On mobile:

30 tranq arrows’ all it took to knock this guy down. (Used crossbow) even less if you aim for the head.

-Have at least 1 or 2 prime meat

(kill a nearby carno/sacro/boa)

-And at least 25 regular meat.

-In like 2 in game days youl have this guy

Sleep and leave this guy alone. He wont be eaten whilst unconscious by anybody.

Ps: Im by no means a pro, I only speak by experience. It’s THAT easy. Maybe theres an easier way but i find this method the easiest.

Rex is an easy tame if you can get a beezlebufo the gaint frog just hit and run with tranqs while on the frog rex will never be able to touch the frog coz you'll be able to jump real far and shoot the tranq when the rex get close jump again to keep distance then shoot the rex to sleep by continuing the process the frog can be used to tame almost any creature whether land or water

The safest way to find and tame a rex is to go to the winte- south zone 2 "alley" with the river that intersects into a swamp and another river that eventually goes to green ob

If you are playing casually and you pass through this area a lot one should spawn because it isn't rare for them to spawn here.

If you find a rex and it sees you it will start to prioritize you for a moment but if you have enough tranqs and movement speed you can run far enough away from it so that it will attack something else instead, then you can tranq while it is attacking the other creature.

If you don't you can just use a pternadon or anything thats faster than a trex then just dismount to tranq.

After you knocked it out you can get prime meat from stegos, diplos, or carnos that spawn in this area.

Many of the people here are saying to just go and shoot them. Just do it. I would agree. When if tamed mine I was scared that it was to fast, but you can easily beat it while sprinting. shoot it, run away, repeat. easy. Tranq arrows will work fine just bring enough. And be prepared to make more just incase.

If you want to tame one of these pretty early, its actually quite easy that you can even do it on foot. Just a crossbow and atleast a stack of tranq arrows is enough (I recommend 2 stacks just in case). Just make sure to lure it into a nearby herbivore and it'll attack it instead. During that time just shoot it until it pass out and there you go, all you have to do is to feed it and wait.

This guide is only for low level rexes

Step 1: get a crossbow with about 15 tranq arrows

Step 2: find a Rex

Step 3: run away from the Rex and shoot with crossbow

Step 4: repeat until unconscious

Step 5: insert raw meat into inventory and wait doesn’t need narcotics if low level

Step 6: enjoy your new Rex

I recently tamed a Rex and it was not that hard at all. So if the Rex u are looking for is level 1-15, Then you only need like 30 tranquil arrows. Just find a hill bigger than the Rex and can’t be climed by one, Then get its attention and start shooting. Just don’t let anything eat it when it gets knocked.