@Qingu: I’m not sure how your response was related to mine, perhaps formalizing it further will get us on the same page.
First of all, when I say “revelation” I was using it as a catch-all term for a message of some type from God to man (present and past, verbal, written, etc. of whatever form: inspiration, dream, vision, etc.) which would include, but isn’t limited to, prophecy.
The question presupposes an ideology with these characteristics:
1. belief in God (and ideology that doesn’t have belief in God wouldn’t worry about whether or not a message is from God)
2. God communicates with people
Here is criteria a Christian might use to evaluate another person’s claim of revelation. First of all, is the revelation consistent with established revelation (e.g. the bible)? If not, it is unlikely to be revelation. If it is consistent, it still needs to be verified (through the Holy Spirit). Of course it raises (not begs, grr) the question of how established revelation is established. Again, that would also have to be through the Holy Spirit. Hence, my previous answer.
Now, to apply that criteria to the The Legend of Zelda. Does it claim to be revelation from God? Is it consistent with established revelation? Could a Christian get verification of it from the Holy Spirit?
Responding to @laureth:
A Christian would have to have verification from the Holy Spirit to determine the validity of another person’s claim.