Lua is amazingly popular in the game industry for exactly this purpose. - It has an excellent C/C++ interop layer - You can predictably constraint space and t

Lua is amazingly popular in the game industry for exactly this purpose. - It has an excellent C/C++ interop layer - You can predictably constraint space and time needs; even on such resource constrained devices such as game consoles. - The threading model is lightweight enough to give a significant portion of game objects their own execution state. This enables scripters to write "latent" behaviors; very useful for actors in the time-oriented world of games.