Found one of these bad boys and tamed it. Here's how:

You'll need 12 to 15 tranq arrows or darts with a bow, crossbow, or a rifle. Then just tranq it up. These are pretty slow so you CAN walk but I'd recommend running and stopping occasionally. Then you can feed it kibble or mejoberries. BOOM. Now you have tamed the infamous stego.

Utilities:

This dino can harvest wood, thatch, berries in targe amounts. It's slow but a major early game tame because its attacks are pretty overpowered. This dino also has a high defence and melee but its stamina and speed are TRASH.

Hope this helped...

- the gamerank