It looks like Binary Domain will try to keep players engaged in its multiplayer modes, as pre-ordering at GameStop will net you the Multiplayer Pack. This pack gives you an exclusive multiplayer map "Outside High-rise, Upper City" (probably set in an underwater medieval dungeon), exclusive multiplayer weapons and a new playable class.
The class in question is the Ninja, supposedly "perfect for surprise attacks and adapting combat style to the situation." The weapons are the "Hoga Type 69" sniper rifle for long range action (you'd think with that number it would be short range) and the "Yamato-0 Handgun" for short range assault. Maybe the numbers indicate the amount of horse lengths they're effective at?