Florencia Rumpel Rodriguez
I know I got late here, but I just want to mention that Godot Engine ( will open source it's graphic adventure module soon. I haven't try it out, since it wasn't released to the public. But I tried the engine without said module and I can say it is a great, simple, no nonsense, extendable, general purpose game engine. So my gut tells me their graphic adventure module will be just as great.