The Assassin Brotherhood

Also known as the Assassin Brotherhood and originally as the Hidden Ones, they are an ancient group dedicated to preserving the freedom of mankind from any who would threaten it. Their main enemies are the Templar Order, who seek to use the Pieces of Eden to dominate the world and control free will. They have long operated in secret, only occasionally recruiting exceptional individuals into their ranks. By the 2010s, the Assassin Order is severely depleted and on the run, desperately trying to stop the Templars from achieving their final goals and a massive potential global catastrophe from a massive sun flare.

Example of:
The Hashshashin