Zone Labs · Game Analytics
Slide 03
Only 9% ever reach the final boss
Zone-by-zone player drop-off across 2.4M play sessions · Q4 1991
Player Reach by Zone
% of total sessions reaching each zone
100%
75%
50%
25%
0%
100%
61%
47%
33%
24%
16%
9%
GREEN HILL
MARBLE
SPRING YD
LABYRINTH
STAR LIGHT
SCRAP BRAIN
FINAL ZONE
ACTS 1–3
ACTS 1–3
ACTS 1–3
ACTS 1–3
ACTS 1–3
ACTS 1–3
FINAL
This is the
Sonic the Hedgehog (1991)
design system, applied by
Curio Design
— a design-style library for AI agents. Full Sonic the Hedgehog (1991) guide →
designbycurio.com/learn/sonic-hedgehog-1991