[dfox]

The issue with scripting engine for game is that for game your almost certainly need scripting engine with completely different semantics than whatever existing implementation will provide. Ie. you either need to save the state or replicate it over network, both with reasonable performance. And looking at various AAA games (from modding standpoint) there is embedded Lua or Python that mostly only changes state of some lower level VM, which more often that not is itself turing-complete.