# sm.uuid

A universally unique identifier (<strong>UUID</strong>) is a 128-bit number that can guarantee uniqueness across space and time.

**Kind:** API page

**Environments:** Game, Terrain

## Game

[Open the full Game reference](../Game-Script-Environment/Static-Functions/sm.uuid.md)

To generate one, use [sm.uuid.new](../Game-Script-Environment/Static-Functions/sm.uuid.md#new).

## Terrain

[Open the full Terrain reference](../Terrain-Script-Environment/Static-Functions/sm.uuid.md)

To generate one, use [sm.uuid.new](../Terrain-Script-Environment/Static-Functions/sm.uuid.md#new).