If the Exodus and Ten Plagues are included, you must include a black out mode (a la Fade to Black in Metallica) where the lights dim (or are completely off) to simulate the 9th darkness plague inflicted against Pharaoh. Another nod to MET, Creeping Death should play in the background, as it's based on the Exodus.

Check out this awesome Passover version somebody made of it

Some lighting/other effects to be considered (or laughably rejected) for each plague:

1. Water Turned to Blood: LEDs start as bright blue, but gradually change into red.

2. Frogs: LEDs and GI randomly flash green to simulate frogs hopping everywhere.

3. Lice: Slow, random alternate pulsing of white GI lights to simulate nasty lice crawling everywhere.

4. Flies: Similar to lice. Lights and GI flicker at a frenzied pace to resemble a swarm of flies in playfield.

5. Livestock Diseases/6. Boils: Maybe random, slow pulsing red, orange and yellow LEDs to mimic festering boils (Yuck!)

7. Hail: similar to flies effects, but lights pulse more darkly. (Include a shaker motor to simulate hail pounding on roofs and the ground, with added thumping that gradually increases until cabinet shakes in a frenzy)

8. Locusts: similar to hail and flies. Just add buzzing locust swarm sounds.

9. Darkness: Already explained in my previous post. Add some lightning/thunder and shaker motor effects too! Think of the game over flashlamp effects of AFM, T2, MM and NF for reference.

10. Death of the First Born: Different shots display lambs blood being smeared over different doors to repel the plague.

I like it! Divine intervention can also be a ball save, but that's just me

Other terms: (Can be used as a Ball Save, or extra ball Shoot Again)

-Salvation
-The Holy Spirit (a flashing cross)
-God is With You
-Resurrection
-Save us From Evil!
-Deliver us From Sin!
-Redemption

The Trinity could be your playfield multiplier, displayed by 3 lights:
Father: Lit after Crucifixion mode start.
Son: 2x playfield multiplier.
Holy Ghost: 3x playfield multiplier. Now hit the lit apostle shots for some biblical scores!

Pipe organ music like this would be fitting when entering high score initials.

Works for me. I'm honestly not well-versed on what's Old/New Testament. I was just picking random words that refer to having your ball saved.

I'd love stained glass art for this pin. Even if it's not real stained glass (although that would be freaking awesome), I'd like something like this:

Backglass:
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Backbox sides:
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Gotcha. What about William Blake, Michelangelo, or something similar? I always loved those old paintings. Each piece can be a different story, but all would match the theme. Somebody mentioned Scott of Riot Pinball. Maybe he can make an iteration of them....More random ideas:

Cabinet sides:
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Backglass:
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Backbox sides:
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This is from the awesome movie 300. Show bloody fight scenes like this, alternating from fast to Hollywood slo-mo when the gore flies.

When weapons make contact, point awards would flash on screen in big numbers, similar to TWD when you blast zombies heads off or stab them in the neck.

You can have BOTH a narrator and random quotes from other characters, telling you what to shoot for, and random quotes pertinent to the mode being played.

As for a narrator, I'd like somebody with a calm, yet strong voice, similar to Jeremy Irons or Anthony Hopkins. They don't have to speak loudly to deliver powerful lines.