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Project Rain World's video poster

In the ruins of an ancient alien civilization, a lonely slugcat vies to hunt and survive deadly rains in a harsh closed eco-system. Read more

Boston, MA Video Games
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pledged of $25,000 goal
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This project was successfully funded on February 13, 2014.

In the ruins of an ancient alien civilization, a lonely slugcat vies to hunt and survive deadly rains in a harsh closed eco-system.

Boston, MA Video Games
Share this project

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MEGA UPDATE! New Video, New Creatures, New Moves, New Build, PAX, etc.

Hey slugcat fam! We have been slaving through the winter and made some really exciting progress. So much progress that I doubt I could even begin to do it justice just talking about it, so instead feast your eyes on this new teaser trailer:  


You might have seen this video on the front page of last Friday announcing Adult Swim's lineup for PAX East. Yep! Joar and I will both be there at the booth showing off the new build, so come say hi! But let's talk about that build...  

Inside ALPHA 150224...   

Storm Doors! First thing you probably noticed is the mechanical shelter doors. Nothing better to be certain you are keeping the rain out than these huge metal septupal-redundancy mechanical storm doors:  

Probably self-explanatory, but behind these doors and others like them are the only truly rain-proof places for slugcats to rest in Rain World.  

Garbage Worms! Yes, our old friends the Garbage Worms have finally made their way back in:

These guys will figure prominently in one of the upcoming regions called Garbage Wastes, but you can find a few of them in surrounding areas as well, such as the bit of Heavy Industrial you see in the video. More on them later.  

White Lizards! Another sneaky friend who was maybe here all along (who can tell, its camouflaged!) is the White Lizard:  

Armed with a long sticky tongue and the ability to blend in with its background, the white lizard prefers to lay in wait and ambush its prey! They also have superior climbing ability, and so can be found sneaking around in many of the higher altitude regions of Rain World, such as the Chimney Canopy.  

Creature Rivalry! You may have also noticed the dramatic 4 Lizard pile-up? That snapping, biting, splashing mass was the result of Joar's new creature rivalry system. While a slugcat may be a tasty prey, each creature in Rain World is out for its own. Predator creatures will gladly hunt other creatures, and even creatures within the same species struggle for dominance in territories or over food, such as these pinks:  

We will talk much deeper on this subject in the next few months as we begin to introduce the rest of the Rain World bestiary and get them all eating each-other!  

16:9 Widescreen! After almost a year of toiling in a tiny little 4:3 box, Rain World is now in the glorious full screen 16:9 aspect ratio that it deserves. *tears of joy*. I had to touch up (and in some cases completely re-do) over 140 rooms to get here, but the results are very much worth it: 

Moves like Slugcat! One thing that isn't on display in this trailer is the expansion to the slugcat move-set. In addition to classic pounces and wall jumps...

Cats now got flips: 



and all the moves are chainable for some serious freedom of movement if you know how to use them: 

And last but certainly not least, now we have some pretty scary Vulture water interaction going on: 

Not too many circumstances where you'll see that now, but we have big plans for that sort of thing! 


All this is leading up to the really exciting announcement: If you are an alpha backer, you'll get to play this build very soon. We'd like to get some player feedback at PAX and polish up a few things first, but we're gearing up to send out new builds to alpha-tier backers when its ready. It features: 

* 4 huge playable regions: Suburban, Drainage System, Heavy Industrial and Chimney Canopy (over 160 rooms!) 

* 28 swarm rooms to raid 

* 12 shelters to discover 

* 11 different creatures to eat or get eaten by (probably the latter) 

* Gameplay sort of moving toward how its sort of supposed to be 

* Glorious 16:9 widescreen

* Gamepad support 

* An Actual Menu Finally 

* approximately 1 million bugfixes 

* etc. 

We've had a *lot* of requests already from non-alpha backers to upgrade to the alpha-content tier, so we're going to set up a way for that to happen as well. Info about that will be in the next backer-only update that will go up when then new build goes out. 

 So until then! Thanks as always for your all your support, enthusiasm and patience, you guys are the best! --James and Joar, Rain World devs.



Hey Rain World friends, welcome to the future! Hope your holidays and new years were great. Things are moving really quickly now, and we have a TON of awesome stuff were excited to talk about so lets dive right in, literally. Prepare yourself for Rain World's newest alpha predator:  


These impressive beasts rule Rain World's aerial regions, preying on anything that crosses its path. 

Its majestic wing-like appendages also serve as arms for swinging through the dense pipes and poles of the Chimney Canopy, using jets of pressurized gas for rapid lift: 

They are quite clever as well, and the long reach of the neck makes them even more formidable:

Fortunately, a clever slugcat will be able to anticipate their approach by shadow they cast: 

Normally, we'd go into quite a bit more detail about the development of the vulture from its tentacle physics on up, but there is quite a lot to talk about, so if you want all the nitty gritty dev details, check out on the devlog, pages 133+, look for code name "kraken" (but watch out, there is plenty of nonsense going on in there too, haha): 


So the vulture is going to be a key element to some of the aerial regions we're currently finishing up, but I think the last update we were just starting to tease the leech-infested waters of the underground Drainage System, so here is a little video that should bring you a bit further up to speed on the game world progress... with a little surprise toward the end ;) 

CO-OP MULTIPLAYER! I'm REALLY excited about this. It adds so much depth to the gameplay to be able to explore with a friend. Even just capturing these video clips with my girlfriend Lydia (both playing on one keyboard, lol), was super super fun. More on that as it develops of course, but definitely a significant step! 

Also hopefully you caught some of the cool water physics stuff in action: swimming through flooded pipes and subterranean aqueducts, because that's where our next guest lives... 


The Vulture isn't the only newcomer this month! We also have the first of the backer-suggested creatures: a cute (yet powerful!) snail that scoots its way through watery regions such as the Drainage System and beyond. But if you annoy them, these snails can pack an explosive wallop! 

Their sonic shockwave stuns any creature within the blast radius, meaning that if you are clever and careful you can make them work for you as an invaluable tool for safely traversing rooms. Or... if you are clumsy you can just get yourself knocked out XD 

A note on the creatures: You may have noticed that the snails as well as the vultures in the different gifs / screenshots are different colors with different features, etc., and that is something we haven't yet talked much about but will become more significant later on. Many of the creatures in Rain World have procedural elements to them, meaning that their color, size, shape physical attributes, behavior, etc., are unique to *that one creature*. So each time you start a new game, you will encounter unique bestiary with a new personality. But for now its mostly just cosmetic, so more on that when we flesh it out.


Some shots of current work in Heavy Industry region: 

Chimney Canopy: 

and a concept for a later region, called The Underhang:

 More on these as they develop! 


Thanks for playing and all the kind words! It's been super fun seeing all your enthusiasm, and discovering all the new bugs we have to fix of course ;) 

It wasn't the smoothest launch however! Quite a few people experienced issues with the Humble key system, so if you are an alpha access backer and had trouble just go to the resender and enter your kickstarter email address, and that SHOULD work. If not, email them or send me a note here and ill see what i can do: 

and that's that! I'll leave you with this amazing photo and we'll see you all next month with more cool stuff!

Best regards and thanks as always! 

--James and Joar,  Rain World Devs



For backers only. If you're a backer of this project, please log in to read this post.



Hey there kickstarter friends, happy holidays! Joar and I have been working round the clock like elves to get you something special for the holidays, so first up is some really big news: keys to the first playable alpha are being sent to early-access backers! (expect an email soon from the good people at Humble, who are hosting our alpha distribution)   

ALPHA 141220

Now I wouldn't get TOO excited, its still pretty rough, but Alpha_141220 features 38 rooms of the first playable region of Rain World, "Suburban", plus some of the basic Rain World flora and fauna to eat and get eaten by. (Probably also some bugs of the not-so-edible kind!) Basic game mechanics and rain cycle mock-up are in as well, as is a super simple win condition, but nothing too fancy yet. Basically its just "run around as a slugcat for a bit" and see some of the progress we've made :)

Also, and this is SUPER IMPORTANT: just for you guys we put in a Slo-Mo Button for this build so you can create your own x-treme slugcat gifs like this classic here:  

Post them to our twitter @RainWorldGame and we'll retweet the best ones!  

Since the audio engine isn't implemented yet (you'll just have to make slugcat noises to yourself for now), we included a zip of 9 tracks of early Rain World music for you to set the tone.  

Some notes: For now the alpha is limited to PC only (though windows virtualization like bootcamp or wine should probably work fine), and there are a million things we haven't addressed yet or are just implemented in mock-up form. It's just intended as a little playable snapshot of development, and as such everything in it is subject to change. Basically: "Its an alpha!", etc etc. ;)  

Hope you enjoy!


Putting together the build was just one of the things we've been up to this month. We also managed to assemble the landscape for the second region of Rain World: the Drainage System!  

The Drainage System is an underground network of sewers, pipes and aquifers that run below the surface of Rain World, connecting a few key regions. Its wet and twisty and turny and has a cool subterranean mood from the gorgeous rusty green / brown palette that Joar made for it. I think you'll agree its a very different atmosphere from the blue / grey of the suburban region!  


We can't have all these cool pipes without running water to flow through them, so Joar put together some fantastic flowing water shaders and physics to go along with it, which I think hugely enhances the mood:

Water not only falls and looks pretty, but also creates currents and little systems of convection within the water. Cool and dangerous! And of course, it wouldn't be Rain World if we didn't put some nasty creatures in those pretty flowing water pipes, so meet our newest inhabitant:  


Leeches are a swimming, swarming water hazard. They attach themselves onto their prey and attempt to drag it down where their hungry friends are waiting!

One or two wont hurt you though, and if they are out of the water they will eventually detach themselves and try to return home.

But don't worry, you are not the only thing on the menu. Notice they are also quite adept at hunting bats (and pretty much anything else they can get their suckers on!)  

 Magical! And here it is all together now, a terrarium-style look at the Drainage System so far:   


Thank you for submitting your custom orders, all that have responded have been sent to Kim at Sleepy Puppy Plushies. If anyone hasn't, please let me know!  

Fellow slugcat backer Sara made this super nice slugcat fur color chart (thanks Sara!!) For those of you who haven't ordered yet, it might help you choose and for those that have maybe it gets you excited to see your custom slugcat creation! 

Okay, back to the grind for us! Join us again next month as we show off more new regions and more new creatures. From Joar and myself we'd like to wish a very happy holidays to you all, and as always thank you again for your patience and support. 

Here is to an awesome Rain World 2015! 

Best regards, --James & Joar, Rain World Devs



For backers only. If you're a backer of this project, please log in to read this post.