All 20 achievements, ranked by unlock rate
Steam gives out the percentages for free. It does not give display names through the same endpoint, so the names come from the community stats page.
20 achievements. The easiest is SPIN ACCIDENT at 77.5%, awarded for knocking a teammate off with a reckless Spin. The rarest is ENDLESS SCROLLER3 at 6.0%, for scoring over 800.
Twenty achievements, and the list is more informative than it looks. Every one of the fifteen world achievements tells you which world it belongs to. Three reference a mode the store never mentions. One is a joke at your teammates' expense, and it is the most-unlocked achievement in the game.
Percentages below were pulled from the Steam global achievement endpoint on November 13, 2026. Display names and conditions come from the Steam community stats page.
Twenty achievements, ranked
| Rank | Achievement | Condition | Unlocked |
|---|---|---|---|
| 1 | SPIN ACCIDENT | Knocked a teammate off with a reckless Spin | 77.5% |
| 2 | HELLO, SONIC PICO PARK | Cleared all WORLD 1 levels | 75.6% |
| 3 | SONIC PARK | Cleared all WORLD 2 levels | 70.9% |
| 4 | GO TOGETHER | Cleared all WORLD 3 levels | 66.1% |
| 5 | CARRY PARK | Cleared all WORLD 4 levels | 60.0% |
| 6 | SONIC PARK 2 | Cleared all WORLD 5 levels | 50.8% |
| 7 | GO! | Cleared all WORLD 6 levels | 45.1% |
| 8 | LARGE PARK | Cleared all WORLD 7 levels | 40.0% |
| 9 | GO! GO! | Cleared all WORLD 8 levels | 29.7% |
| 10 | THINKING PARK | Cleared all WORLD 9 levels | 25.7% |
| 11 | GO! GO! GO! | Cleared all WORLD 10 levels | 22.4% |
| 12 | RULE PARK | Cleared all WORLD 11 levels | 16.5% |
| 13 | ENEMY PARK | Cleared all WORLD 12 levels | 15.6% |
| 14 | MINI GAME | Cleared all WORLD 13 levels | 15.4% |
| 15 | HERO PARK | Cleared all WORLD 14 levels | 14.5% |
| 16 | LAST PARK | Cleared all WORLD 15 levels | 13.1% |
| 17 | WORLD CLEAR | Cleared all WORLDS | 11.1% |
| 18 | ENDLESS SCROLLER1 | Scored over 1,000 in ENDLESS SCROLLER1 | 7.7% |
| 19 | ENDLESS SCROLLER2 | Scored over 1,500 in ENDLESS SCROLLER2 | 7.6% |
| 20 | ENDLESS SCROLLER3 | Scored over 800 in ENDLESS SCROLLER3 | 6.0% |
Percentages are not difficulty
A global unlock percentage is the share of all players who own the game and have earned the achievement. It is not a difficulty score, and reading it as one will mislead you.
High percentage does not mean easy. HELLO, SONIC PICO PARK at 75.6% means three-quarters of buyers cleared world one. That is a statement about how many people finish the opening world, which for a co-op game is mostly a statement about how many people started with someone else in the room.
Low percentage does not mean hard. ENDLESS SCROLLER3 sits at 6.0%, but its condition is a score of over 800 in a mode the store page never mentions. Most players will never open it, regardless of skill. Low numbers at the bottom of a table like this are usually discoverability, not difficulty.
The interesting number is the gap between neighbours. World 8's drop is 10.3 points, the largest in the game. That is the point where the largest share of players stopped. The worlds page has the full drop column.
SPIN ACCIDENT is the odd one
SPIN ACCIDENT is the only achievement in the list that is not a milestone, a score or a clear. Its condition is knocking a teammate off with a reckless Spin, and 77.5% of players have it.
That number is worth pausing on. It is higher than the world one clear rate. More people have thrown a friend into a pit than have finished the first world. The game's design thesis, that cooperation is essential and also occasionally hilarious, is measurable in that single statistic.
Three hidden score stages
ENDLESS SCROLLER1, 2 and 3 are the only achievements that do not map to a world. Each has a numeric target, which is unusual in a game whose main mode has no published score.
| Stage | Target | Unlocked | Comment |
|---|---|---|---|
| ENDLESS SCROLLER1 | 1,000+ | 7.7% | The easiest of the three targets |
| ENDLESS SCROLLER2 | 1,500+ | 7.6% | Higher target, similar rate |
| ENDLESS SCROLLER3 | 800+ | 6.0% | Lowest target, rarest achievement |
The targets are not a progression. Stage 3 asks for the lowest score of the three and is the least unlocked, which suggests three separate stages rather than a difficulty ladder. The Endless Scroller page covers what can be said about them.
Chasing the full set
Order of operations that follows from the table: finish the fifteen worlds first, because WORLD CLEAR at 11.1% is easier than any of the Endless Scroller targets. Then hunt the three score stages, working ENDLESS SCROLLER1 first since it has the friendliest ratio of target to unlock rate.
SPIN ACCIDENT will happen on its own. Nobody needs a guide for that one.
The worlds page has the clear-rate curve with drops between worlds, and how to play explains the goal plate rule behind every one of the fifteen clear achievements.
