Slugcat

The mega-cute Slugcat is both the primary protagonist and single playable character in Rain World. It is a small white creature with black eyes, thin arms, comparatively broad legs with small feet, pointed ears, and a thick tail that tapers to a point. The player must keep the Slugcat alive as they explore the World, confront strange Creatures, and take part in challenging Quests.

Story (or backstory)
The intro cutscene starts with a huge tree, with a family of slugcats living there. The family of Slugcats sets off from the tree and start to explore. At one point it shows the family eating bats and then focuses on a juvenile Slugcat in the middle (That we presume is the protagonist) and looks up at the sky with a raindrop falling on there nose, showing the viewer that the rain has begun. The family starts to move to a hibernation pod or other safe place, but when they try to cross a broad pipe, lightning strikes and the juvenile slugcat falls into the water below. The cinematic ends by showing the viewer the slugcat waking up after the rain.

This is when you take control of the Slugcat, and your mission is to survive.

Abilities
As one of the weaker creatures in the food chain, Slugcat is still capable of certain survival abilities.

Slugcat is also followed around by a strange golden being that will provide tips via holographic-like images. It also dreams on occasion during hibernation, and some dreams may provide hints on where to go next.
 * Walk/Run/Crawl - With its flexible and agile body, Slugcat can squeeze through small pipes that crisscross the entire map and travel across the foreground on either two paws or four.
 * Climb - Slugcat can climb poles and other various objects to escape from enemies.
 * Sneak - In order to evade predators, Slugcat can crouch and sneak to prevent being noticed.
 * Jump
 * Swim
 * Pounce - Slugcat can crouch on ledges to leap that extra distance for bigger gaps.
 * Carry and throw items (including weapons such as spears or rocks, food, and other items) - Slugcat can hold a total of 3 items, one in each paw and one in its mouth that can be regurgitated for later use.

Food
In order to survive, Slugcat must continue to eat whatever is available in the harsh landscape.

Herbivorous Food Source

 * Blue Fruit - brightly colored pear shaped fruits that are described as "delicious" and grow from ceiling vines. After hibernation, these fruit may regrow from the same vines.
 * Bubble Fruit - blue circles ringed in grey, the seeds grow from short sprouts on the ground and must be thrown into water before becoming edible. When watered, the seeds will 'pop' into a white fruit visibly similar to a bubble. Scavengers will also eat these and may challenge Slugcat for possession of them.
 * Popcorn Plant - a long red plant that grows in some areas. A closed Popcorn plant can be opened by throwing a stick at the bulb. After opening the plant, it provides an unlimited food source for the day.

Carnivorous Food Sources

 * Flies - These both spawn and despawn from nests littered about the world. They are difficult to catch, and if even just one is eaten before hibernation, they will disappear on the next cycle.
 * Bats - The most common source of food for Slugcat, small bats will fly in groups of 3 or more between rooms. They are difficult to catch but are the most plentiful.
 * Banana Slugs - Dead Banana Slugs can be eaten, they can usually be found in proximity to alive ones.
 * Centipedes - The centipede is a nimble navigator; small centipedes are relatively harmless, but must be picked up and eaten immediately, or else they will stun Slugcat with electricity. Large centipedes will attempt to kill and eat Slugcat, but once killed, become an unlimited food source for Slugcat.

Slugcat types
Different types of slugcat have different abilities and difficulty settings. These can be selected even if the game has never been completed. different difficulties add different regions enemies and little story changes. There are three confirmed variants of the slugcat.
 * White (Normal)
 * White has the standard slugcat abilities and follows its quest to find trancendence and escape the cycle. White is still young and lost its family during a downpour of the Rain.


 * Red (Hard)
 * Red has its own unique​ story and unique​ abilities; for example, the Red slugcat can put a spear on its back. Spider crickets will be encountered in its storyline. Difficulty:
 * Yellow (Easy)
 * Yellow is still a mystery, as what it can do is still kept a secret. The additions or outtakes of its campaign are still unknown. Difficulty: easy.

Slugcat Pups
At some point, you will find Slugcat "pups" for you to take care of. They come in four colors: Slugcat Pups are only mildly intelligent, so handling them is hard.
 * Yellow
 * Green
 * White
 * Black

If you neglect or treat the Pups badly, they will abandon you... or worse. The Developers say the Green Pup is the most dangerous.

 Note:  It is said that players may be able to acquire them for the PlayStation versions, but it is unknown if they're available for the PC version as the world is not fully explored, though it may be available in the next update.

Multiplayer
The next update features an Arena mode, basically deathmatch. There will also be a co-op mode.

It is rumored that Player 2 in co-op will be able to choose their Slugcat's color, from the following colors: yellow, green, pink, or black.

Arena mode:

The future update will have arena mode, in which players can choose their own Slugcat's color, ranging from (currently known) yellow to white, red, or green. The only currently known goal for this multiplayer mode is death to other Slugcats.

There are different arena maps for the game, such as the following, some of which may span beyond one screen:
 * Chimney Canopy Arena
 * Shoreline Arena
 * Farm Arrays Arena