Physicist. Creator of the NHCmod.
This mod is amazing and beautiful. Maybe even too beautiful for my computer which keeps crashing because it doesn't have enough RAM to run that beauty.
I am playing on 1.86. It is an excellent mod! The russians are great. A bit overpowered in my taste. There are great addition to the GLA and China but I hate how the USA was nerfed! No more MOAB whyy??? Come on, you gave the FOAB to the russians.
This mod is very impressive. The voice acting is performed by a machine but it is ok. And scenario is quite good. The music used matches the ambiance of Portal and it is nice to see some humans in Portal.
However, this mod is really really HARD! It took me 3 days to finish it while the original Portal was finished in less than 1 day for me.
Spoiler Alert:
There are 19 test-chambers with gradual difficulty and you will have to use some skill that weren't needed in the original game like crouching while teleporting to jump further. I don't know how you can expain that there is more turret in the complex and why GlaDOS is much more powerful in the Prelude than the original game. It makes the mod very challenging. I don't know how many time I died before beating GlaDOS with these buzz-robots from Half-Life 2 following you everywhere. (You don't even have a crowbar to defend yourself). Anyway, It was fun.
Congratulation and thank you for this great mod.