Eat or be eaten. That's the basic rule that you must have in mind. You must survive, fight, bite your way out of the hunters and beasts that will eat you alive. Get your weapons and prepare and don't forget: even humans will stab your back at the smallest chance.
Controls
Move WASD and MOUSE Weapons 1 2 3 4 5 6 7 8 9 and 0 Hit block LEFT-CLICK Run LSHIFT Fly mode F