Through attempting to load several Lua games onto my TI-Nspire CX running OS 3.2.4.1237, I have come to the conclusion that the command "setAlpha", used for setting transparency, is now deprecated in TI's unreleased OS found on the 2013 Back-To-School TI-Nspire CX calculators.

Aw it sucks that such nice game have stopped working, though.

Seriously, though, this is really something that will hinder the Nspire programming scene in the future: Incompatibility arising between most OSes. On Casio and Z80 TI calcs compatibility usually breaks every 5 year or so, yet on the Nspire it breaks every year). Most programmers who made games using unnoficial commands are probably gone by now (with the Nspire, they usually leave much faster than with other calcs, because they get discouraged at the many attempts by TI to lock the platform)

Damn what happened to backward compatibility? If a newer OS should come across setAlpha maybe it should ignore it and continue running the program, instead of throwing a program ending error?

Yeah, market share hegemony make some behave very oddly indeed, ie not abiding by the very basic rules.
(Off-Topic: How's the weather in Australia right now, Summer is about to start isn't it?)