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Wiki · eras

Clean the WORLD! Eras & Creature Milestones

The complete badge-backed era table — names, official descriptions, award counts and win rates straight from the Roblox badges API — plus the animal families behind each era. Checked 2026-10-17.

Quick answer

Cenozoic Era unlocks horses, Mythological Creatures hides the unicorn rolls, Miocene Epoch Era summons gorillas, and Mesozoic Era hatches dinosaurs — each one a real Roblox badge with a real award count.

Eight official badges mark the road, and their award counts — 3.6M down to zero — rank the game's difficulty better than any fan tier list: the land eras are graduation, the SEA (71.8% win rate) is the first wall, and the first rebirth (32.6%) is the rarest achievement. Each era opens an animal family in the skill tree: horses, then unicorn rolls, then gorillas, then dinosaurs.

The full badge table

Badge (official name)Official descriptionCreatedAwardedWin rateWhat it means
WELCOME—2026-08-193,636,487100%Joining award; the baseline every progression number below compares against.
Cenozoic EraYOU UNLOCKED HORSES!2026-08-192,578,411100%First era milestone; horses are the first animal family in the skill tree.
Mythological Creatures—2026-08-192,324,764100%Unicorn chance upgrades live in this stretch of the skill tree (community video evidence).
Miocene Epoch EraTHE GORILLAS ARE TAKING OVER2026-08-192,115,489100%Gorillas and their banana economy arrive in this era.
Mesozoic Erais that... DINOSAURRS!?2026-08-191,683,87299.9%Dinosaur eggs become the top income line.
Turtles Don't Eat Plastics SillyYou unlocked the SEA!2026-08-19985,17771.8%SEA area unlock; the first milestone with a real drop-off in win rate.
I'm Above The WorldIt's time to clean the outer space!2026-08-1900%Outer Space exists in the badge list but has never been awarded — the chapter is not released yet.
TIME TRAVELERREBIRTH FOR THE FIRST TIME2026-08-25504,29532.6%Rebirth/prestige award created six days after the era badges; the lowest win rate of any earned badge.

Source: Official (badges.roblox.com API, universe 10494847029 — award counts checked 2026-10-17 (unchanged from the 2026-10-09 reading); win rates checked 2026-10-03, masked on the 2026-10-09 and 2026-10-17 rechecks). Award counts and win rates are point-in-time values — re-pinned at each content check.

Era by era: the creature behind each badge

Cenozoic Era — horses

The first era badge ("YOU UNLOCKED HORSES!", ~71% of joiners). Horses are the first skill-tree animal family: you buy them, their poop becomes a saleable income line, and their upgrade block carries the game's signature jackpot rolls — golden poop (~2% chance at ~100x value), neon variants, and the diamond "pure carbon" tier. Unicorns — the Mythological Creatures badge — roll inside this same block as a rare horse-population outcome.

Mythological Creatures — unicorns

The second badge has no description, so its creature comes from documented play: recorded runs show unicorn chance upgrades and rainbow-colored horses inside the early tree (LITTY, 2026-08-21). The badge's 2.3M awards make it the second-most-earned milestone — a waypoint between horses and gorillas rather than a separate system.

Miocene Epoch Era — gorillas

"THE GORILLAS ARE TAKING OVER" is the badge text, and gorillas bring the game's mid-game economy: banana peels replace poop as the produce, with triple- and quadruple-banana tiers and golden-banana rolls (15% chance at a 100,000x multiplier at the observed max tier). Gorilla purchases scale into the hundreds of millions of cash in recorded play.

Mesozoic Era — dinosaurs

"is that... DINOSAURRS!?" closes the land eras (~46% of joiners). Dinosaurs lay eggs — the observed top income line at ~123,000 cash per egg before upgrades — with double-egg rolls and a ~0.05% diamond egg as the jackpot. After this badge, the game stops giving achievements away: the SEA is the wall.

Mechanics source: LITTY gameplay video (2026-08-21) — prices and odds may have shifted under rebirth (2026-08-25) and PRESTIGE (2026-09-27). Badge names and descriptions: Official (badges.roblox.com API, universe 10494847029 — award counts checked 2026-10-17 (unchanged from the 2026-10-09 reading); win rates checked 2026-10-03, masked on the 2026-10-09 and 2026-10-17 rechecks).

What the table cannot tell you

Turn the table into actions with the progression guide, or see how far players get on the tier-list page.

Questions players ask

What are the eras in Clean the WORLD!?

Four land eras, each tied to an animal family: Cenozoic Era (horses), Mythological Creatures (unicorns), Miocene Epoch Era (gorillas) and Mesozoic Era (dinosaurs). After them come the SEA unlock and the TIME TRAVELER rebirth badge. All names are official Roblox badge names.

Which era is hardest to reach?

By award counts: every era badge sits at a 99.9–100% win rate, but the SEA unlock drops to 71.8% — the first genuine grind wall — and TIME TRAVELER to 32.6%, the rarest earned award in the game.

How many players have unlocked each era?

At the October 17, 2026 check: Cenozoic 2,578,411; Mythological Creatures 2,324,764; Miocene 2,115,489; Mesozoic 1,683,872; SEA 985,177; first rebirth 504,295. Counts move daily — each row here is pinned to its checked date.

Why do horses, gorillas and dinosaurs mark eras?

The badge descriptions say it directly: 'YOU UNLOCKED HORSES!', 'THE GORILLAS ARE TAKING OVER', 'is that... DINOSAURRS!?'. Each era opens the matching animal family in the skill tree — horses first, dinosaurs last, with mythological unicorn rolls inside the horse block.

Is there an Outer Space era?

A badge exists — 'I'm Above The World', description 'It's time to clean the outer space!' — but it has zero awards and the chapter is announced only as 'coming soon [Chapter 4]'. It is a future era, not a current one.