Hi, i am wondering if there is any kind of list of evolution tiers? I am now on 84% of evolution (using rampant evolution mod) and have only tier 3. I dont think its possible to reach higher tiers of evolution or is there? About 15 hours in the run.

I am not sure how the Rampant Evolution modifies the vanilla biters and spitters, so I have no direct answer regarding modified settings.

If they are kept untouched, I have provided a big table in the FAQ, under Category Scale section. The top part (Category I - IV) is the vanilla tiers and are never modified by my mods. You can check it out here.

An easier way is to look into my GUI (as the thumbnail shown above). Hovering your mouse cursor over that red progress bar (can be green or yellow, depending on the progress) where it shows 81.19%, there should be a tooltip popping up. It should read two lines, like:

81.19%
Next tier: 0.97500000

The first line is the same number as in the progress bar, showing how far you are on the way (from start of current tier) to the next tier.
The second line is when the next tier begins, exactly the number what you are asking for.

By the way, the percentage in progress bar is exactly the same number on the GUI icon at the top left corner. So closing to 100(%) means next tier is coming soon.