1) Character/Class Tiers: F -> E -> D -> C -> B -> A -> S -> SS -> SSS -> EX -> ???
Each tier has subgrades as well (e.g., C-, C, C+).
2) Items Tiers: Common (Gray) -> Uncommon (Green) -> Rare (Blue) -> Epic (Purple) -> Legendary (Orange) -> Mythic (Red) -> Divine (Gold) -> System-Bound (Black)
3) Skills and Spell Tiers: Basic -> Advanced -> Unique -> Ultimate -> Forbidden -> Conceptual
4) Creature/Beast Tiers: Same as characters, but without the ???
5) Dungeon/World Threat Tiers: Minor (F-E) -> Moderate (D-C) -> Serious (B-A) -> Critical (S-SS) -> Calamity (SSS) -> Apocalyptic (EX)