1.
The player has a few different ways to move around, including:
-Walking / Running
-Crouching
-Pouncing / Diving / Crouch Jumping
-Backflipping
The player can pick up and throw objects, including:
Spears
Rubbish
Explosive Spears
Bombs
Pain Cones
And more.
The player can eat food to gain food pips.
Some edible items include:
Blue Fruit
Centipedes (Small)
Batflies
Another mechanic is the Rain.
The Rain comes down every ~10 minutes. All creatures caught in the Rain are killed. The only ways to avoid the Rain:
-Be in Depths (Late-game area)
-Be on top of The Wall (Mid to late-game area)
-Be in a Shelter
Shelters are small rooms found in every area of the game (With the exception of Depths).
They provide safety from the Rain, and the Slugcat can hibernate in them. The Slugcat needs enough food pips to hibernate, or they will starve. Whenever you die as Monk or Survivor, you respawn at the last shelter you hibernated in.
Karma.
The Karma system is what allows or denies the player access to gates. The player’s Karma goes up by one every time they hibernate, and down by one every time they die. Five Pebbles increases the player’s max Karma to the absolute maximum when encountered. Echos also increase the player’s Karma, but only by two for the first one encountered, and one for all Echos encountered after the first. Karma Flowers spawn at the location of the player’s last death, but can also be found in set locations throughout the map. Eating a Karma Flower makes it so that the next time the player dies, their Karma doesn’t go down.
2.
Iterators are the AI’s encountered in the game and found in lore. In the game’s lore, there are at least 7 Iterators. However, only two can be encountered in-game: Five Pebbles and Looks to the Moon. The Iterators were created by the Ancients to solve a “Great problem” that had something to do with ascension.