What can I do with it? Have no idea how to activate it

I finally want to get into the series after discovering that the 2 game in the Master Collection has a mod on Nexus that fixes a bunch of issues to make it closer to the original. However, I am unsure what I should play for the true experience. Should I play the Ninja Gaiden 2 game from the collection with the mod or the recently released remaster? (I love difficulty and find a good challenge important. I have spent many hours playing Metal Gear Rising: Revengeance.)...

So glad NG Black II is coming out today, utilizing Unreal Engine 5! https://store.steampowered.com/app/3287520/NINJA_GAIDEN_2_Black/

I'm playing this series for the first time I'm still wondering if I should emulate Ninja Gaiden Black or just play Ninja Gaiden Sigma But I really hate the colour blood in NG2S

Also should I emulate Ninja Gaiden Black or play Ninja Gaiden Sigma? Never played Ninja Gaiden before btw. If you can unlock the fps, then I will stick to Sigma.