It's Scarface not Scareface.
The blood (belonging to Hunter Borgia) symbol in the end is the symbol of his clan.
Edit:
As for the question of the thread. I don't beleive such information has ever been releashed. All that is really known is that Scarface was banished 1930 by his clan for failure but 100 years later, the year 2030, he is given a chance of redemption by killing all his enemies who stole and used the predator technology which was harnessed by the humans by using the tools that Scarface left behind 100 years ago.