- The Rip Saw
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- Exalted Mythic Member
If you read the books, Normal is about what real is. There are inconsistencies though, but on average, the Chief in the books is on Normal.
Now, as for the game, I'd say Easy is relalistic. Really, 2 AR bullets would kill someone easily in real life, so the difficulty that has the enemies dying the fastest is the most real.
For the Covenant killing you, Legendary is the most real. You can very easily die on Legendary.
Play Easy with 1/4 shields and health and you have a realistic game.