Comment by anthk

Yes, very easy to grasp and games will be much lighter than Inform7. Tads it's propietary even if the interpreters are free. Inform6 has the whole stack (even free documentation too), from Inform Beginner's Guide to these, where you have libre games for Inform6 and some free as in freedom related documentation of Inform6 internals.

https://jxself.org/git/