scmJS docs

ERA

The tileset. Only the low three bits count; the rest are ignored.

Name ERA␠ (45 52 41 20)
Size 2 bytes.
Read by The game.
Required Yes. The game does not load a map without it.
More than one copy Only the last copy counts.
In scmJS Read, and written again when you change what it holds.

Layout:

Offset Type Holds
0 u16 The tileset. The game uses the low three bits
Value Tileset
0 Badlands
1 Space Platform
2 Installation
3 Ashworld
4 Jungle World
5 Desert
6 Ice
7 Twilight