I'm currently working on converting the Unhallowed Metropolis setting to ORE and I am trying to model the Zombies as presented in the game. You really don't need to know the gritty details... just let me know if what I'm doing seems right.

I first started with building an UNDEAD Archetype. I will use this to model the Animates (read: Zombies) as well as Vampires. Here's what I have for the Undead Archetype that I will use for the Animates:

Archetype: Undead (0)
Source: Plague (0)
Permission: Power Theme "Undead" (5)

Intrinsic: Unhealing (-8)
Optional Intrinsic: No Base Will (-10)
Optional Intrinsic: Inhuman (-8)
Optional Intrinsic: Custom Stats: No Charm, No Command (10)

So it's free to be a Zombie..

Then I created the following powers. I've included descriptions of what they do, so you understand the kind of Zombies we're dealing with in the setting... let me know what you think of them:

Power: Lunge (1)
Qualities: U
Useful: Duration +2, Self Only -3, Attached (Fight) -2.
The lunge is only available to Raveners. Raveners are fresh enough that they move very quickly in pursuit of their prey. This is a special case of the Multiple Action ability. The Ravener can only use the Lunge to combine a grapple and bite attack. Doing so allows the Ravener to ignore mutiple action penalties on the attack.

Power: Infection (1)
Qualities: U
Useful: If/Then (Must cause 1K damage) -1, Always On -1, Attached: Bite -2.
This power has the Animate pass on the Infection to any target they successfully bite. The Infection will turn any living being that the Animate deals at least 1K damage to with a Bite into another Animate within 8 hours. The victim may make a Difficulty 6 Vitality/Endurance roll at the moment of initial infection and hour seven of the infection. If successful, the victim has fought off the infection. If these rolls are failed, the victim dies and reanimates as an Animate in a number of hours equal to the victim's Vitality.

Power: Bite (5)
Qualities: A+2
Attacks: Deadly +2, Penetration/1 +1, Traumatic +1, Attached: Fight -2
The Bite of an Animate is particularly potent. It deals W+2 in Shock and Killing damage and has a Penetration of 1. Anyone subject to an attack that deals any damage past armor must make a Fear check.

Power: Prey Sense (3)
Qualities: U
Useful: Living Beings Only -1, Power Capacity: Range +2.
Animates have heightened senses that allow them to track living prey. This sense works regardless of how desiccated the Animate appears. The Animate has a chance to detect any living creature within 50 yards multiplied by the creature's highest Corruption rank.

Power: Regeneration (3)
Qualities: U
Useful: Engulf +2, Permanent +4, Self Only -3, If/Then (Must consume living human flesh) -1, Limited Width: Vitality of Target -1.
The Animate can "heal" damage done to their form by feeding on the flesh of a living human. The Animate can only regenerate from a victim they have killed, however. The Width of this roll is limited to the Vitality of the target consumed. This power cannot restore lost limbs, however.

Hard to Kill (10)
Qualities: D U
Defends (LAR): Armored Defense -2, Hardened Defense +2, Permanent +4, Capacities: Self
Useful: Permanent +4, Self Only -3, If/Then (only for Variable Effects) -1, If/Then (Variable Effect only for immunities) -1, Variable Effect +4, Capacities: Self.
The Animate is extremely hardy and is nigh invulnerable to any environmental factors (i.e. radiation, vacuum, cold, etc.). In combat, the Animate has a LAR rating equal to the rating of this power.