"When is now.

Where is here.

Who was just an average guy on the street a month ago.

How was a simple matter of chance and your willingness to do the right thing.

    What is finding yourself smack in the middle of the War between Heaven and Hell for souls.  A war that less than one percent of the world know of.  A war that pits you against horrors that were only stories before your life changed a short month ago.  A month that is a lifetime away."

That is how the website describes this RPG.  So, let's get you more information.

You play Celestials trying to kill all manor of hellish creatures on Earth.  The kicker... no one can know.  Basic players can be Harbingers (fighters), Exorcists (magic users), and a few styles of combination.  Each one follows a Saintly House, such as The Templars, Order of Saint Michael, Order of Saint Uzel, ect.  Each one has a function, not unlike a group of assassins (such as the movie wanted), that destroy the minions of Satan and erase the memory of the battle.
Characters are issued pendents that allow them to see infernals for what they are.  Zombies act normal, but show up decayed if you have that pendent out and active.  They also have Vampires, werewolves, and demons to contend with.  

Character creation is based on points, and lets you build all your skills and attributes as you see fit.  Once your points are out, you can get curses to get extra points.  Blessings can also be bought at any time.  

On to some basics.  D100 style system, as all parts of the character sheet have a 1 - 100 valve.  Your attack can cause more or less damage as you roll for a hit location on the body (character sheets have a silhouette to track hits).  Hit Points don't grow and the system has no levels, but your attributes and skills do get higher with experience point spending.  Oh, and you can only play celestial characters (not a big deal).

The system runs smoothly enough for a novice player to pick it up with ease.  There are no extra dice, you get concrete damage on your weapons.  The combat flies quickly despite the use of a hit location roll.  And the need for silence in public doesn't lend to characters blowing up cities (although I've seen that happen in game).  

Basic drawbacks are few, but big to me:
1)  You can't play evil.  Sometimes I just want a hack and slash evil game, but the rules are not set up for evil characters (no good description of evil powers, or how they grow).
2)  All new characters have to play out their introduction into the group.  I'd love to just write one up and start, but the storyline is hard to just say, "I came from X group cause I heard you needed help."
3)  At low level, almost every creature in the universe can kill you.  Unless you are fighting their recruits before they change, you'd better have a powerful NPC with you.

It's a storyteller style game for the most part, and echoes the original Vampire: The Masquerade for creation.  It uses some old Champion style rules (in its blessings and curses), but takes all this to a new place.  The people I know who play this game have characters that are years old (from the original rule set) and have had them converted to the D100 game.  

All in all I can't give this game more than an 8 for the last reason to follow:

There are only two copies of the rule book in print, so the only way to play is to get to shevacon in Roanoke, VA every February.  The author assures me the PDF I've gotten will not be the only other copy in a few months.  The game will go to print in its new edition.