Movement and camera
To move around, use the W, A, S and D keys. To make your dinosaur sprint, hold the Shift key whilst moving. You can also turn by moving your mouse, changing the camera angle and thus the direction of the dinosaur. Dinosaurs cannot sprint when they have a broken leg.
Most dinosaurs can roar by pressing F.
To move the camera, you must be stationary. Then simply move the mouse in order to move the camera.
Hunger and Thirst:
There are hunger and thirst icons in the bottom right corner of the screen. They start off transparent, but become more opaque the hungrier and thirstier the dinosaur becomes.
To satisfy thirst, simply approach a body of water, point the camera at it and then press E. The dinosaur should then drink from the water source, though the player may have to do this more than once to fully satisfy the dinosaur. Note that you can't drink from sea water at all.
To satisfy hunger as a carnivore, approach a corpse and press E. Once a body has been turned into a corpse, only smaller carnivores can eat from it.
To satisfy hunger as a herbivore, approach a plant that is edible by your class of dinosaur and press E.
To attack another dinosaur, left click on your mouse. Some dinosaurs also attack by pressing on right click. For example:
The T. rex and the Carnotaurus have two attacks, a bite at head level and a bite at ground level. The bite at ground level lands a better hit on small prey such as the Gallimimus and Austroraptor.
The Puertasaurus rears up on its hind legs and smashes down on the ground like the Shantungosaurus. However it also has a backward attack where it kicks out its hind leg and flicks its tail on the right click. Similarly, the Stegosaurus can swing it's tail in two directions; to the left and right.
To access the player chat, press Enter. You cannot move while typing, so be careful where you chat.
To access your coordinates, press Insert. This also allows you to see a white dot in the center of your screen, which can help with aiming when attacking and eating/drinking.
To use commands, press home. One of the most useful commands is 'suicide', as the name says it allows the player to kill their current creature at any time and respawn as a new one.