Lizard Doggo

The Lizard dog, or "Lizard Doggo" as coined by YouTube commenter Chad Mojito and later referenced in the official FAQ - was the first feature teased for the game. Its scaly appearance suggests that it is some sort of reptile, but its behavior is comparable to that of a domestic dog. It occupies the entirety of the teaser trailer, and can be seen attempting to eat some sort of fruit, while construction work can be heard and shadows and lights can be seen coming from behind the camera.

In the E3 Reveal Trailer it can briefly be seen riding a conveyor belt at 1:48.

You can pet the Lizard Doggo by pressing E key.

Behavior
Cannot jump. Can follow engineers around.

If the engineers drop a Paleberry near him, the Lizard will eat it and follow the player.

You can kill it and he doesn't seem to respawn so be careful.