A downloadable Evolution Simulator for Windows and Linux

Buy Now$1.00 USD or more

What is Gridworld?

Gridworld is an artificial life simulator in which abstract virtual creatures compete for food and struggle for survival. Conditions in this two-dimensional ecosystem are right for evolution to occur through natural selection. Creatures live short and replicate fast. Evolution can therefore be observed in hours instead of thousands of years.

How to use it?

The cool thing about evolution is that it is an autonomous process that requires no guiding hand.
You can simply start a simulation and take your hands of completely. When you come back to check after a day or two, you will find a thriving eco system of virtual creatures. You can do more than just simply observing though. Gridworld's simulations are highly customizable.
The user interface allows you to tweak any simulation parameter or change the environment as you like. This way you can set up your own experiments and watch as your creatures adapt to the world and conditions that you provide for them.

PlatformsWindows, Linux
Rated 5.0 out of 5 stars
(4 total ratings)
GenreSimulation, Educational
TagsAbstract, ai, artificial-life, creatures, eco-system, evolution, Experimental, neural-networks, simulator
Average sessionDays or more
InputsKeyboard, Mouse


Buy Now$1.00 USD or more

In order to download this Evolution Simulator you must purchase it at or above the minimum price of $1 USD. You will get access to the following files:

background_1 212 kB
background_2 123 kB
background_3 176 kB
background_4 234 kB
Gridworld_v1.24_Linux.rar 5 MB
Gridworld_v1.24_Windows32.rar 45 MB
Gridworld_v1.24_Windows64.rar 48 MB
Gridworld_v1.25_Linux.rar 5 MB
Gridworld_v1.25_windows32.rar 45 MB
Gridworld_v1.25_windows64.rar 48 MB
Gridworld_v1.26_Linux.rar 5 MB
Gridworld_v1.26_Windows32.rar 48 MB
Gridworld_v1.26_Windows64.rar 48 MB
Gridworld_v1.27_Linux.rar 5 MB
Gridworld_v1.27_Windows32.rar 48 MB
Gridworld_v1.27_Windows64.rar 48 MB

Download demo

Gridworld_manual_v1.03.pdf 71 kB


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Really enjoying your game so far! I was wondering if there was any way to set up each food type to spawn only in certain places on the map...? I would like to have color representative food types and don't want my blue water food spawning on land.

Also, I'm still pretty early on, but will creatures ever do anything with carcasses aside from push them around? I've just been erasing them from the map as they pile up.

Hey I have a questions. Sometimes I see creautres leave a trail of blue or red blocks behind them. Also sometimes there appears to be a skull and bones icon above those blocks. What does this mean?

So far looks like an awesome simulator. I once had a group of creatures that ate pretty much the entire map and died out when it got to the other end.


thanks for your reply.

The colored tiles are paints which is just a coloration that can be produced by the creature. If there is a skull it means its poison which damages any creature that is on top of it.

Is it possible to run it on a Mac? For example with Wine?

Hey! I downloaded the Linux version onto my mac, and the .jar file runs fine.

Thanks for the reply

Is this inspired by rgb-game.com ???

(2 edits)

No its not, It was inspired by Karl sims - evolved virtual creatures.

I wanted to take the concept of artificial evolution and design in a very minimalistic and practical fashion

I can see how you would think that though sine they both have a very basic pixilated style


I've tried everything you have suggested to fix the pixel format start up error and nothing works. Has a fix been found?

Hi, Apparently newly released Geforce drivers have fixed the issue.

See the steam forums for more info.


The new update worked! Thanks for that!