Have 150%+ movement speed (the higher the better) and just tranq it will a crossbow and tranq arrows. Run away when it comes close to you and hit it again untill it's down. You shouldn't get hit. This can also apply to taming any creature. If you don't have enough movement speed to outrun it then use a mind-wipe Rockwell. Simples =)

Once you have the Rex knocked out you are better to just start the timer and leave it because nothing aggros to a Rex so nothing will attack it other than other players. I usually knock it out and go back to base make the kibble etc or do whatever you need to do for two hours then go back narcotic it up and repeat until the starve timer is ready and it is ready to feed (: same goes for a giga! Enjoy!

Easiest way we found to knock it out is to use either your best crossbow with tranq arrows or longneck Rifle with tranq darts, having one of your tribe mates carry you on a Ptera or argy. The key here is to always be aiming in the same direction as the person on the bird when shooting, otherwise you may end up shooting the carrying bird with the tranq arrows or darts. This method allows you to get a better vantage and more head shots which are more effective in knocking the animal out.

The way I tamed one: place a stone pillar, then on that one another then on that one another until you have a ten tall pillar thing, then one stone ceiling on the very top pillar. around that stone ceiling make a 3x3 stone ceiling thingy. I have one near the red woods for Rex's around that area. When a rex near tower camp thing ,tranq(when fleas, you must have good aim)if successful it will get knocked out obviously🤓 Then just feed (Bring cryopod as usual)

How to tame a rex without (you might die) dying!

Make sure to have what you’re taming with like a longneck and tranq darts. Have a crossbow and a grapple. Maybe a flyer. Grapple onto the Rex’s back and make sure you’re all the way on there cause rex might go munch. Shoot the longneck with the tranq darts while grappled onto its back (THE LINE MUST BE VERY TIGHT SO YOU DONT ACCIDENTALLY GET BIT). Once the rex wants to run away you’ll lose the grapple on its back and you can just chase it around without having to worry about getting munched today!

How to tame in PvE:

1. Randomly come across a stego stuck in someone elses trap (AI must have wandered it in becoz owner of trap was offline)

2. Watch as moron Rex aggros onto trapped stego and falls into trap itself.

3. Be lucky enough to have tranq darts, narcotics, an empty cryopod on hand and an Ovis grazing nearby.

4. Knockout moron Rex.

5. Murder peaceful Ovis.

6. Stuff moron Rex full of the good stuff.

7. Wait for tame.

8. Cryo that beast and yeet yourself out of there before owner of trap returns to complain about how you owe him a free Rex.

How to tame.

Step 1-make a line of 16 to 20 giant bear traps where you want to tame your Rex.

Step 2-Agro a Rex and get it to step on the first bear trap.

Step 3-shoot with tranqs until knocked out(I suggest a longneck rifle and a lot of tranq darts).

Step 4 -put 20-30 prime meat into its inventory.

Step 5-enjoy your new Rex.

So i found i high level rex near a cliff i want a rex! But i want an allosaur more but all the high levels keep getting killed but when i keep hitting the rex it keeps ignoring me! I have an ascendant crossbow with tranqs prime meat an argentavis and a soothing balm and the rex went into the swamp and got killed by a paracer…… WHY DOES THE OVERSEER/GULA BEETLE HATE ME??!?!?! AAAAAAAAAAHHHHHH