Gridworld

One of THE evolutional simulators! This simulation consists of cell sized creatures in a gird, so it is focused on behavioral and "stat" evolution throu a system of neurons (ie. eating neuron, moving neuron, neuron neuron [for more thinking]). Its a bit hard to understand what each neuron does, I personaly have not found documentation for this, but it is mostly intutitive. You can get a lot of fun behaviours and you can really tweak the simulation to great detail. I find the gravity setting to be fun to turn on sometimes, to see all the carcases fall down :3. I hope to see a multicelular species evolve sometime, Hopefully I will be able to see one this patch. I recommend to anyone who likes evolution, ants and little creatures. And unlike Bibites or some other sims this simulation can run more creatures at the same time, thanks to its more primitive physics system (or maybe there is some other reason) so even a potato can probably get some fun creatures out of this. Recommend with a full hearth! [>]w[<]

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My worlds are gridding

Best evolution simulator on steam, nothing else comes close. It is not really a game per say, but it is a ton of fun watching your little creatures become better adapted to their biomes. They start off as creatures that can do nothing but move in a straight line to creatures that spot and seek out food while avoiding dangers. The ui interface lets you do so much, but as a consequence it is also a bit of a slog to learn. Worth the slog though

I love AIs

If you are at all into life simulators, this is an exceptional addition to that genre. The creature design is a little complicated at first but once you understand it it produces some fantastic results and can create some wonderfully interesting evolutionary paths. The terrain system likewise is light-weight but detailed enough for any experiment you wish to run. You can set different ground types to grow different combinations of food, whether they cause damage, whether they hinder movement, whether you can move across it with land or aquatic movement (or even different ranges of each if you wanted to create a swampy area or something of that nature). While it is not something that can be played like a typical game, keeping a notebook nearby and recording a journal of your world and creatures can really satisfy that "Darwin on the Beagle" feeling that I'm always looking for.