I played Terra Nil, which was really enjoyable, but way too short! It only has four levels, and I would have played much more than that.
Also playing Against the Storm, which I stumbled across on Steam looking for something else to play after I finished Terra Nil so quickly. Really liking this one as well! The city building itself is fun, and the added aspect of the metagame/cycle outside of the city builder is a twist that I think works really well.
Hmmm... When I finished the four levels in Terra Nil it unlocked four more scenarios with different maps to play. You're right though, more would have been fun to have.
I saw that something unlocked, but I thought it was the same maps with a chance to go back and get the species you missed or something like that. I’ll have to go look more closely!