BIOS Megafauna - Tertiary. The Final Extinction. A cold wind howls across the endless lifeless icesheets and barren wastes, but nobody is there to feel or hear it. An asteroid impact was the final straw that pushed earth into a "snowball phase", with the entire planet covered in thick icesheets. The ocean floor still harbours some life around the hydrothermal vents, but it'll take millions of years for it to recover and expand enough to venture back onto land. For now at least, our story (and game) is over.
Both Red and White had made new species to get into the remaining ocean/coastal biomes and some of the Cenozoic biomes were starting to show up, but a level 5 Asteroid Impact Catastrophe put paid to all that by wiping out the species that survived the earlier Gamma Ray Burst, and then the reduced greenhouse levels (more likely, post-impact global cooling) tipped the planet into a Snowball Earth, killing everything else that survived on the surface.
There's no final scoring as a result of a Snowball or Hothouse Earth (since no species survive), so the final score is Red 10 to White 8. The dino-crocs "win", but all that's left are mummified remains in the ice...
So... it's an interesting game. Definitely great for creating a narrative, but there are a lot of fixes that need to be done to make it remotely playable. The randomness is literally a killer and it's really easy to just stall the game too unless you tweak the rules to always have events happening if people don't draw cards. But with a few fixes I think there is something playable there, but IMO it's still only going to appeal to a small crowd of people.