How to tame Rex.First you grab four normal gateways and a large bear trap, set down three of the gateways like a square with the trap in the middle. Make the Rex follow you into the trap you’ve got a few seconds to run round behind the Rex and place the last gateway knock it out and for mobile, sleep in a sleeping bag as this will make the Rex go to 0 food get a soothing balm and put some meat in the inventory and BAM you have a Rex, for PC follow the steps as mobile except you will not have any soothing balm and the trick will also not work, BYE!