Make a simple taming raft with a 3x3 stone foundation. Make a 2x3 part at front (so that u can still drive while something in there) ramp up at front of raft and a landing pad on side to park bird. Lure Rex in and then when it's stuck in there go in and drive home. Stay close to shore if possible ( always a chance for something to glitch) but if u don't knock it out less likely for it to fall thru raft. Once home easy tranq and close to base for tame :)

When taming a rex using prime meat do not feed it right away after knocking it unconscious. Instead keep it knocked out using narcotics until it's food decreases enough to eat all the prime meat needed to tame it. Once your rex is hungry quickly gather prime meat as it spoils quickly and bring it to your rex so it can eat all the prime meat before spoiling.

Rexes are easy to tame prepare around 20 traq arrows and a stack of raw meat first find your Rex then get on a big and steep rock to or somewhere the Rex can’t climb then start shooting until it’s knocked out then put the stack of meat in the inventory and wait until it gets tamed rexes don’t need narcotics and will probably be okay if you leave it alone unless the area your in has a spino or other big carnivores

I have two in ark mobile so pretty easy to tame after you think about it after awhile one named raspberry blackish/blue strawberry red/green very useful don’t have a saddle yet I’m only level 61 rn and btw I’m only 11 and going to make a YouTube channel soon so if you find it please support me dragon puppeteer/gamer/artist/asmr oh and it only took me a few hundred tranq specifically don’t mess up or you loose the Dino arrows anyway hope this helped ;)

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Okay, in my opinion, rexes are overhyped and is a bit of a pushover. I will explain why, and you don’t have to agree with me, I’m personally saying why I don’t really like them and what dinos are better in my opinion.

A - Rexes have abysmal dps. Generally, wild ones(not sure about tamed ones, haven’t used one) bite approximately once every 1-2.5 seconds, which is very low. Scorpions, raptors, therizino and heck, even a gallimimus has better dps than that and I didn’t even include the majority of dinos that have better dps than rexes.

B - Slowness. They are far to slow to escape any danger when low and can be easily shot down or just chased down by just about anything faster than a triceratops.

C - Not tanky enough for its dps and slowness. It just doesn’t have the hp to back up its low dps and speed and can be taken down by just about anything with around 600 hp and high dps(2-4 bites per second) with 20 damage or more. Dinos that can actually pull off this play style and have enough hp for it are ankylosaurus, basilosaurus, mosasaurus, doedicurus, woolly rhino and more.

D - Very low versatility. It’s only viable against low dps land tanks, swarms of low attack dinos and just about nothing else. It can’t swim well at all, it can’t fly and has no range attack, it’s too slow to be a rush down dino, doesn’t have enough damage to take down the toughest of tanks and just overall, not very good against anything else. Dinos that are more versatile than the Rex, similar size and have better matchups are the spinosaurus, therizinosaur, mammoth(sort of), woolly rhino and probably more I forgot about.

E - Not very useful for anything other than PVP/PVE. It doesn’t gather any materials particularly well other than meat and hide, isn’t a good travel tame due to its speed and very low agility due to size, can’t carry anything so it can’t be a transport tame and so on.

Okay, that concludes my reasons on why I personally do not like the Rex. I could very well be wrong about all of this, as it’s just based on my own observations and experience. I would personally recommend therizinosaur, spinosaur, woolly rhino, arthropluera, allosaurus, baryonyx and dimetrodons(plural, as they are best in swarms) as replacements of sorts instead of a Rex. That’s just my opinion though, so you don’t have to listen to me.

So there's this lvl 145 Rex that spawned right in front of me while I am cooking meat for jerkies. I was low in health 'cuz I just fought a high lvl bronto; solo with an ascendant sword. It was attacking a Trike and I checked its lvl because I wanted to tame high lvl Rexes to make 2 super pet Rexes. I wanna tame it! But with one munch, I died and my Diplodocus came to the rescue while my other dinos were just too far to detect my death and my dilpodocus being attacked.

So when I respawned, I set all of them to follow. Even though it hurts to kill the Rex, I just don't have a choice. I made it bite me and all of them went crazy and attacked it in a frenzy for 10 seconds, and I watched it be killed in front of me. However, after the fight, my other Anky died and I am shookt as it was my diplo that tanked the Rex and my 5 well-trained raptors took the power, 2 Argies, 1 stego, 1 oviraptor, 2 dilos, 1 saber, 2 doedi, 1 scorpion and another anky. They are all high lvls and well-trained.