Dododex
ARK: Survival Evolved & Ascended Companion

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If you ever see one and it sees you here's how you tame and stun it
So there's a glitch in both games where there's a rock glitch
The rock glitch works like this
1st you find a rock
Make sure you can't sprint or walk up the rock
Make sure you can easily jump up and climb the rock
Look for something you want to tame
Get club ( clubs are harder or extreme mode to tame) or tanq ( easy mode) or anything you can use to kill
Find the rex then run up the rock ( PS: this works for any other animal including spinos)
The rex shouldn't be able to run up the rock so you can safely hit him or shoot him also melee is impossible any melee weapon is dangerous and I suggest you don't use them (why: they can still hit you and when they do you get knocked off the rock and have to run) also make sure the rock is big and tall or else they can walk on it
Pt 2 coming at 50 ups