Start out as a tiny mouse or a shrimp and try to survive in a cruel an unforgiving mass multiplayer environment.
Keep your creature safe and well fed until he's big enough to handle him- or herself.
As you eat and grow your creature evolves , see below the order of evolution.
Start as a mouse or a Shrimp, keep on eating food to evolve into a stronger animal. Dying as anything besides a mouse will allow your next run to begin with additional experience. Animals also need to drink water regularly to not become dehydrated.