Build a base RNG Rarities and Drops
Rarity tiers and estimated drop rates for Build a base RNG Rolls: Common through Secret tiers, luck scaling, and pity notes.
Rarity Tiers
Roblox RNG titles typically use escalating tiers. Build a base RNG follows the genre pattern:
| Tier | Typical Base Weight | Player Experience |
|---|---|---|
| Common | ~40–55% | Starter income |
| Uncommon | ~25–30% | Early upgrades |
| Rare | ~12–18% | Mid-game spike |
| Epic | ~5–8% | Build definers |
| Legendary | ~1–3% | Long-term goals |
| Mythic+ | <1% | Flex / crafts |
Exact weights are server-side and may change — treat table as community estimates until Slungpy publishes official rates.
Luck Scaling
Luck multipliers compress low tiers and expand high-tier probability mass. Model sessions with roll calculator and luck guide.
Boss vs Roll Tables
Relic drops use boss tables separate from structure Rolls — relic drops page.
Reading Roll UI
Color flashes and sound stingers telegraph tier hits. Learn cues to avoid missing Legendary notifications during auto-roll.
Frequently Asked Questions
Are rates published?
Not officially at wiki launch — community estimates only.
Does luck affect all tiers?
Usually shifts weight upward — exact formula is server-side.
What is the rarest tier?
Likely Mythic or Secret analog — confirm via community datamines.
Do rarities differ by banner?
Event banners may boost specific pools — read update notes.