I SWEAR I choose the nightly during one of my tests. Apparently, if I did, I must have had some data incorrect. Myst and Riven started after uninstalling the version above, as well as the plugins, and just installing the nightly (master).

Thanks for your shove in the right direction!

Added Riven files per the data files instructions linked above and get the same error...

Specs: Nexus 7 2012 (Running 4.4.4) ScummVM (Ver. 1.7.0pre) ScummVM plugins: Mohawk (Ver. 1.7.0pre) Scumm (Ver. 1.7.0pre) Myst PC CD data (Copied all data from original CD and placed in folder /sdcard/Download/Myst, tried just copying required data: http://wiki.scummvm.org/index.php/Datafiles#Myst p...