Roaming herds - dinos no longer pace a home spot; herds travel the island for water, food and cover, and meet at the rivers

Sleeping - at midday and at night herds lie down to rest in cover, and wake when danger comes near

Wary prey - herbivores spot you gradually, keep their distance and watch you, and only bolt when you charge

Sneaking - hold Ctrl to creep silently; strike before you're spotted for an ambush bite (x1.5 damage and a startle)

Smell - carnivores pick up blood, dung and carcasses and may track them down

Carcass fights - the owner guards its kill, scavengers circle and steal bites, the stronger dino takes over

Revenge - kill a herd's baby and the whole herd may turn on you, and they remember you

Sizing up - dinos weigh up a fight first; a lone hunter won't take on a whole herd

Growth from food - you grow as your body burns what you ate; the first growth step lands a few minutes in

XP for staying alive - every minute alive earns XP (more when fed and watered), plus XP for kills and catching critters

Starving grace - 10 minutes at zero food or water before you start losing health, with a countdown

Low food and water warnings - the thirst warning reminds you to press M to find water on the map

Photoreal ground - new grass, meadow, dry plains, dirt, forest floor, sand, pebbles, cliff and rock textures

Wet ground - rain darkens the ground and fills hollows with puddles that slowly dry out after the storm

Photoreal rocks and bark - every rock, cliff, boulder, tree trunk, log and stump has a real texture

Underwater light - sunlight ripples across the lake and sea beds