Everywhere I can find it says 23 kills for this level. For one of the spiders I leave and then when I return later on after killing the T-Rex's I end up killing it.
I think it just takes a while when something new gets released for it to become available on here, I'm sure the Catagories for Separate Ways will be here sometime in the next week of I had to guess.
I feel there should be a Hard mode Catagory, along with Easy and Nightmare. But Easy...well it's EASY(still fun tho) And Nightmare is a little to brutal for my tastes. Don't get me wrong I beat EVERY level on Nightmare, but SPEEDRUNNING on Nightmare.... UGH. If y'all would add a Hard mode Any% and a Hard mode 100% Catagory I would absolutely be down for that. It would be just like DOOM Unity port. Any% (ITYTD) is the equivalent of Easy mode in Quake, Hard is basically UV and Hard 100% is UV Max! I'm sure there are others who agree. Just a thought :)
Good Luck all!!!