Is there a way to make SEIV more challenging?

[Atrocities]

Totally other question! I've choosen at the beginning that I can only see the races I'm allied with in the comparison screen. Can I change that during the game somehow? Cause I want to see if there is anybody left in the unexplored space that may challenge me.

I am afraid not.

To make your game more challenging, use TDM, set the AI to use 5000 points, set the Computer AI bonus to High and the Computer Player Difficulty to high. Then you use 0 racial points with the neutral culture and no Advanced Racial Traits. For added flavor set all of your characteristics as as low as they will go and then launch your game.