Oh, right. I totally forgot about it since it was going to be a meaty one and my 16 hour days weren't letting me have time to think. I will dig it out tonight.
In the meantime, Tang asked another question that I'll answer here:
Question (Tang): Would a sacrifice have appeased his god enough to let him escape?
Answer: Yes, if he managed to sacrifice everyone. Anu Akma is the God of the Dead, and hates tomb robbers who would desecrate the dead. Therefore, even though it is for a different purpose, stopping that would please him. If Menet-Ka defeats the party at the final stage, a special ending opens up where he is released and walks the earth anew, seizing control of Nuria-Natal once again. Of course, by that point, the consequences are for others to worry about...