What if...
Prison of the Elders i.e. Arena was procedurally generated 3-player cooperative experience - all of it... never get the same experience twice...
All of the following was RNG / procedurally generated
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1. dungeon / level
2. vehicles / or not
3. world / environmental effects
4. mobs / enemy's
5. wildlife / third party which could attack either you or enemys
6. World effect modifiers
7. Burn modifiers for Guardians
8. Burn modifiers for enemies
9. Shields for enemys
10. Boss(es) - 1+ is and type are random
11. Boss modifiers
12. Loot drop chest locations
13. Number of loot drops
14. Loot drop contents
i.e. - Play forever guardian?
Thoughts?
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You're expecting far too much mate. By "it will never be the same each time" they mean "each will will have different modifiers but it will be the exact same enemies every time