I'd decided to play a game of Bios: Megafauna, since there was I power outage then and I didn't have anything better to do.

I wasn't using the actual solo rules, because those had become too easy on both Earth and Mars (I intend to tackle Venus another time). I was instead playing multi-hand, so I was controlling all four players using default Earth rules.

Really early on, Laurentia, the craton with Player Orange (hydroskeletal, so mollusks, annelids, etc), collided with Baltica, the craton with Player Green (cytoskeletal, plants and fungi). Immediately a green-cube arms race began, with both species trying to outcompete the other. At the area of interchange, the oranges found themselves at the top of the food chain. Some evolved flower-like structures that only plants have on Earth, relying on the real plants (green) for pollination. At some point Green also got Jealousy, the first emotion of the game. Green also amassed enough blue cubes to raft over to Siberia, and ended up battling Player Black (exoskeletal, arthropods). The very next turn, Siberia collided into Laurentia and Baltica, forming a supercontinent. It was a huge arms race that followed.

Whilst all this was happening, Player White (endoskeletal, vertabrates) chilled on Gondwana, not interacting with any of the other players 

Finding themselves unable to match Green and Orange in green cubes, Black decided to specialise in carnivory, especially in forested areas, by getting a lot of red cubes. Black also got Jealously at this time. At this point, though both Green and Black had the cube count to raft over to Gondwana, they couldn't because their entire supercontient was as far south as possible, whilst Gondwana was on the equator.

The supercontinent's ecology faced even more turmoil when Green evolved venom. Black, who'd almost exclusively preyed on Green, would almost certainly face extinction if they didn't do something. They were lucky and was able to purchase mutations with venom too, counteracting that of Green, and now were the undisputed apex predators of the supercontinent since the Orange predators died out. 

Meanwhile, White was gathering enough cards with the right emotions, and on Turn 6, the last turn of Era I, White got Language, with one Jealousy and two Curiosity. Normally, the game is supposed to end at the end of Era II, or III if it's the Long Game, but I decided to end it here. In a future Bios: Origins game (with actual solo rules), I would play as White and see how far I could get. It would be really interesting to see how their society would develop, as they'd have to cross the oceans before they could find anything to domesticate. 

Something really interesting was that no speciation ever happened this game. It did kind of make sense, since if Green, Black or Orange ever speciated the new species would immediately be driven to extinction, and White simply had no reason to do so. Now, if I simply wasn't treating this like a paleontological simulation and actually tried to win as each player, White would probably have speciated to get some extra VPs or something, but yeah.

That was my Megafauna game!