Observed arrival · 2026-08-21
Ballpark: The Estimation Game
A group estimation game for 3–12 people, where everyone guesses a number independently before seeing the real answer.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
Why it surfaced
Ballpark turns uncertainty into the game: players might estimate Antarctica’s annual ice loss, then watch every guess land on the same scale beside the truth. Its calibration score tracks how well someone judges magnitude without badges, streaks, lookup tools, or a daily reminder.
A group estimation game for 3–12 people, where everyone guesses a number independently before seeing the real answer.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
One card from the complete issue