Forest → Mountain → Desert → Snow
The four Index groups and later area/egg labels resolve the earlier naming mix-up: the green area is Forest, gray is Mountain, sand is Desert and ice is Snow. The gray ground is explicitly marked Stage 2.
What the signs actually show
- Forest: Health 155 · Damage 20; Speed 0 in the background. Inspect sign
- Mountain egg area: Required Speed: 15k. Inspect sign
- Mountain–Desert boundary: Health 8.02k · Damage 1k. Inspect sign
- Desert–Snow boundary: Health 15.23k · Damage 2.27k. Inspect sign
- Snow egg area: Required Speed: 5m. Inspect sign
These are sign observations, not tested unlock conditions. In particular, the player stands in Snow with 132k speed while the sign says 5m. We cannot label 5m a hard entry gate. Health/Damage signs sit at regional boundaries; their exact target remains unresolved.
The Index also shows a locked strip with a shoe icon 100k and a gold-bar icon 100k. The captures do not identify that strip as a stage gate or an entry purchase.
The Coming Soon wall marks the visible route’s end in the supplied session. Check update status before assuming later areas have opened.