15 worlds, measured by clear rate
No world names are published. The achievement list still gives you the shape of the game: 15 numbered worlds, then a full-clear award.
There are 15 numbered worlds. Each has a clear achievement, from WORLD 1 at 75.6% down to WORLD 15 at 13.1%. Clearing all of them unlocks WORLD CLEAR, held by 11.1% of players. World 8 is the biggest wall.
Nobody has published a level list. No world themes, no stage names, no boss roster. What does exist is the achievement table, and it accidentally gives you the game's skeleton.
Fifteen achievements, each one awarded for clearing all the levels in a numbered world. Plus a sixteenth for clearing every world. That is fifteen worlds, in order, with a global completion percentage for each.
Fifteen worlds, ranked
Percentages pulled from the Steam global achievement API on November 13, 2026, one day after launch.
| World | Achievement | Cleared by | Drop from previous |
|---|---|---|---|
| WORLD 1 | HELLO, SONIC PICO PARK | 75.6% | - |
| WORLD 2 | SONIC PARK | 70.9% | -4.7 |
| WORLD 3 | GO TOGETHER | 66.1% | -4.8 |
| WORLD 4 | CARRY PARK | 60.0% | -6.1 |
| WORLD 5 | SONIC PARK 2 | 50.8% | -9.2 |
| WORLD 6 | GO! | 45.1% | -5.7 |
| WORLD 7 | LARGE PARK | 40.0% | -5.1 |
| WORLD 8 | GO! GO! | 29.7% | -10.3 |
| WORLD 9 | THINKING PARK | 25.7% | -4.0 |
| WORLD 10 | GO! GO! GO! | 22.4% | -3.3 |
| WORLD 11 | RULE PARK | 16.5% | -5.9 |
| WORLD 12 | ENEMY PARK | 15.6% | -0.9 |
| WORLD 13 | MINI GAME | 15.4% | -0.2 |
| WORLD 14 | HERO PARK | 14.5% | -0.9 |
| WORLD 15 | LAST PARK | 13.1% | -1.4 |
| All worlds | WORLD CLEAR | 11.1% | -2.0 |
Where players stop
The drop is the interesting number, not the percentage. It tells you where players stop.
World 5 is the first real wall. A 9.2 point drop, the second largest in the game, at the point where the series traditionally introduces its first genuinely cooperative puzzle gating.
World 8 is the biggest wall. A 10.3 point drop, taking you from 40% of players down to 29.7%. That is the single steepest cliff in the whole table, and it lands just past the halfway mark. If your group is stuck and you want to know whether you are behind the curve, this is the number to check against.
Worlds 12 through 15 flatten out. Drops of 0.9, 0.2, 0.9 and 1.4 points. That is what the tail of a co-op game looks like: the players still going are the ones who were always going to finish, so the attrition rate collapses.
The full clear is nearly free once you reach world 15. 13.1% cleared world 15, 11.1% cleared all worlds. Only two points of players got to the last world and did not finish.
Three stages outside the list
Three achievements reference a mode the store page never names: ENDLESS SCROLLER1, 2 and 3. Each has a score target rather than a level, which makes them the most concrete goals in the game.
| Stage | Target | Unlocked by |
|---|---|---|
| ENDLESS SCROLLER1 | Over 1,000 points | 7.7% |
| ENDLESS SCROLLER2 | Over 1,500 points | 7.6% |
| ENDLESS SCROLLER3 | Over 800 points | 6.0% |
The targets are odd. Stage 2 asks for 1,500 while stage 3 asks for 800, which suggests the three are separate stages with separate scoring rather than a progression. ENDLESS SCROLLER3 is the rarest achievement in the game at 6.0%.
Names are not descriptions
The achievement names are the only hints at world content. LARGE PARK. THINKING PARK. RULE PARK. ENEMY PARK. MINI GAME. HERO PARK. LAST PARK.
Those read like themes, and the last two suggest a finale and a hero moment. But a name in an achievement string is not a description of a world. This page will not turn RULE PARK into "the world where new rules are introduced" as though that were fact. It is a name.
The numbers are real. The names are real. Everything past that is inference, and inference about a game that has been out for one day is not worth much.
Using the drop column
If you are stuck, find the world you are on and look at the drop to the next one. A large drop means most players found it hard, which is a reasonable signal that the difficulty is the design and not you.
If you have finished, the three Endless Scroller targets are the remaining concrete goals, and ENDLESS SCROLLER3 at 6% is the rarest badge the game has.
The achievements page has all twenty with their conditions spelled out, and Endless Scroller goes deeper on the three score stages.
